/* =============================================================
   style.css — Tabata Sayacı Projesi
   Modern, koyu tema, glassmorphism ve animasyonlarla
   ============================================================= */

/* ---------------------------------------------------------------
   1. CSS Değişkenleri (Design Tokens)
   --------------------------------------------------------------- */
:root {
    /* Renkler */
    --clr-bg:           #0f0e1a;        /* Sayfa arka planı (koyu mor-siyah) */
    --clr-surface:      #1a1830;        /* Kart arka planı */
    --clr-surface-2:    #221f3b;        /* İkinci seviye yüzey */
    --clr-border:       rgba(255,255,255,0.08);
    --clr-border-light: rgba(255,255,255,0.15);

    --clr-primary:      #6c63ff;        /* Mor - birincil renk */
    --clr-primary-glow: rgba(108,99,255,0.35);
    --clr-accent:       #ff4757;        /* Kırmızı - vurgu rengi */
    --clr-accent-glow:  rgba(255,71,87,0.35);
    --clr-work:         #ff4757;        /* Work = kırmızı */
    --clr-rest:         #2ed573;        /* Rest = yeşil */
    --clr-rounds:       #ffa502;        /* Rounds = turuncu */
    --clr-metro:        #1e90ff;        /* Metronom = mavi */

    --clr-text:         #f0eeff;        /* Ana metin rengi */
    --clr-text-muted:   rgba(240,238,255,0.5);  /* Soluk metin */
    --clr-text-dim:     rgba(240,238,255,0.3);

    /* Tipografi */
    --font-main:  'Inter', sans-serif;
    --font-mono:  'JetBrains Mono', monospace;

    /* Boyutlar */
    --radius-sm:  8px;
    --radius-md:  16px;
    --radius-lg:  24px;
    --radius-xl:  32px;

    /* Geçişler */
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.45s cubic-bezier(0.4, 0, 0.2, 1);

    /* Gölgeler */
    --shadow-card: 0 8px 32px rgba(0,0,0,0.4), 0 1px 0 rgba(255,255,255,0.05) inset;
    --shadow-btn:  0 4px 20px rgba(108,99,255,0.4);
    --shadow-start: 0 6px 30px rgba(255,71,87,0.5);
}

/* ---------------------------------------------------------------
   2. Reset & Temel Stiller
   --------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--clr-bg);
    color: var(--clr-text);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Arka plan degrade mesh */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 0%,   rgba(108,99,255,0.18) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 100%, rgba(255,71,87,0.12)  0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 60% 50%,  rgba(46,213,115,0.06) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}

/* ---------------------------------------------------------------
   3. Yardımcı Sınıflar
   --------------------------------------------------------------- */
.hidden { display: none !important; }

/* ---------------------------------------------------------------
   4. GİRİŞ SAYFASI STİLLERİ (login.php)
   --------------------------------------------------------------- */

/* Arka plan animasyonlu daireler */
.bg-circles {
    position: fixed;
    inset: 0;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
}

.circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.4;
    animation: floatCircle 12s ease-in-out infinite alternate;
}

.circle-1 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, #6c63ff, transparent 70%);
    top: -200px; left: -150px;
    animation-duration: 10s;
}

.circle-2 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, #ff4757, transparent 70%);
    bottom: -150px; right: -100px;
    animation-duration: 14s;
    animation-delay: -4s;
}

.circle-3 {
    width: 300px; height: 300px;
    background: radial-gradient(circle, #2ed573, transparent 70%);
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    animation-duration: 18s;
    animation-delay: -8s;
    opacity: 0.2;
}

@keyframes floatCircle {
    from { transform: translate(0, 0) scale(1); }
    to   { transform: translate(30px, -40px) scale(1.1); }
}

/* Giriş sayfası container */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
    position: relative;
}

.login-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 440px;
}

/* Giriş kartı (glassmorphism) */
.login-card {
    background: rgba(26, 24, 48, 0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--clr-border-light);
    border-radius: var(--radius-xl);
    padding: 48px 40px 40px;
    box-shadow:
        var(--shadow-card),
        0 0 60px rgba(108,99,255,0.12);
    animation: slideUp 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(32px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Giriş başlığı */
.login-header {
    text-align: center;
    margin-bottom: 36px;
}

.login-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 72px;
    height: 72px;
    background: rgba(108,99,255,0.15);
    border: 1px solid rgba(108,99,255,0.3);
    border-radius: 20px;
    margin-bottom: 20px;
    animation: pulseLogo 3s ease-in-out infinite;
}

.login-logo svg {
    width: 40px;
    height: 40px;
}

@keyframes pulseLogo {
    0%, 100% { box-shadow: 0 0 0 0 rgba(108,99,255,0.4); }
    50%       { box-shadow: 0 0 0 12px rgba(108,99,255,0); }
}

.login-title {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, #a29bfe, #ff6b81);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 6px;
    letter-spacing: -0.03em;
}

.login-subtitle {
    color: var(--clr-text-muted);
    font-size: 0.875rem;
    font-weight: 400;
}

/* Hata mesajı */
.alert {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 24px;
    animation: shake 0.4s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

.alert svg { width: 18px; height: 18px; flex-shrink: 0; }

.alert-error {
    background: rgba(255,71,87,0.12);
    border: 1px solid rgba(255,71,87,0.3);
    color: #ff6b81;
}

/* Sarı uyarı — kalan deneme hakkı */
.alert-warn {
    background: rgba(255,165,2,0.10);
    border: 1px solid rgba(255,165,2,0.35);
    color: #ffa502;
}

@keyframes shake {
    10%, 90% { transform: translateX(-2px); }
    20%, 80% { transform: translateX(4px); }
    30%, 50%, 70% { transform: translateX(-6px); }
    40%, 60% { transform: translateX(6px); }
}

/* Form grupları */
.login-form { display: flex; flex-direction: column; gap: 20px; }

.form-group { display: flex; flex-direction: column; gap: 8px; }

.form-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--clr-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* Input wrapper */
.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 14px;
    width: 18px;
    height: 18px;
    color: var(--clr-text-dim);
    pointer-events: none;
    transition: color var(--transition);
}

.form-input {
    width: 100%;
    padding: 14px 14px 14px 44px;
    background: rgba(255,255,255,0.05);
    border: 1.5px solid var(--clr-border);
    border-radius: var(--radius-md);
    color: var(--clr-text);
    font-family: var(--font-main);
    font-size: 0.9375rem;
    outline: none;
    transition: all var(--transition);
}

.form-input::placeholder { color: var(--clr-text-dim); }

.form-input:focus {
    border-color: var(--clr-primary);
    background: rgba(108,99,255,0.08);
    box-shadow: 0 0 0 4px var(--clr-primary-glow);
}

.form-input:focus + .input-icon,
.input-wrapper:focus-within .input-icon {
    color: var(--clr-primary);
}

/* Şifre göster/gizle butonu */
.toggle-password {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--clr-text-dim);
    transition: color var(--transition);
    display: flex;
    align-items: center;
}

.toggle-password:hover { color: var(--clr-primary); }
.eye-icon { width: 18px; height: 18px; }

/* Giriş butonu */
.btn-login {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 24px;
    background: linear-gradient(135deg, #6c63ff, #8b5cf6);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: var(--font-main);
    font-size: 0.9375rem;
    font-weight: 700;
    cursor: pointer;
    margin-top: 8px;
    transition: all var(--transition);
    box-shadow: var(--shadow-btn);
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
}

.btn-login::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.btn-login:hover::before { opacity: 1; }
.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(108,99,255,0.55);
}
.btn-login:active { transform: translateY(0); }
.btn-login:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.btn-arrow { width: 18px; height: 18px; }

/* Alt bilgi */
.login-footer {
    text-align: center;
    color: var(--clr-text-dim);
    font-size: 0.75rem;
    margin-top: 28px;
}

/* ---- Güvenlik Sorusu (Math CAPTCHA) ---- */
.captcha-group {
    background: rgba(108,99,255,0.06);
    border: 1px solid rgba(108,99,255,0.18);
    border-radius: var(--radius-md);
    padding: 16px;
}

/* Soru kutusu + input yan yana */
.captcha-row {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 4px;
}

/* Matematik sorusu görsel kutusu */
.captcha-question {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 84px;
    padding: 10px 14px;
    background: rgba(108,99,255,0.12);
    border: 1.5px solid rgba(108,99,255,0.3);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: #a29bfe;
    line-height: 1.2;
    text-align: center;
    flex-shrink: 0;
    user-select: none;
}

.captcha-eq {
    font-size: 0.875rem;
    color: var(--clr-text-muted);
    font-weight: 500;
    margin-top: 2px;
}

/* Cevap input alanı */
.captcha-input {
    flex: 1;
    padding-left: 16px !important; /* ikon yok, padding sıfırla */
    text-align: center;
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.05em;

    /* number input ok butonlarını gizle */
    -moz-appearance: textfield;
}
.captcha-input::-webkit-outer-spin-button,
.captcha-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* ---------------------------------------------------------------
   5. UYGULAMA SAYFASI STİLLERİ (index.php)
   --------------------------------------------------------------- */

/* Header */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 14, 26, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--clr-border);
    padding: 0 24px;
}

.header-inner {
    max-width: 1080px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 16px;
}

/* Logo */
.header-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-icon { width: 32px; height: 32px; }

.header-title {
    font-size: 1.125rem;
    font-weight: 400;
    color: var(--clr-text-muted);
    white-space: nowrap;
}

.header-title strong {
    font-weight: 800;
    color: var(--clr-text);
}

/* Kullanıcı bilgisi */
.header-user {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #6c63ff, #ff4757);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.user-details { display: flex; flex-direction: column; }
.user-name  { font-size: 0.875rem; font-weight: 600; color: var(--clr-text); line-height: 1.2; }
.user-role  { font-size: 0.7rem; color: var(--clr-text-dim); line-height: 1.2; }

/* Çıkış butonu */
.btn-logout {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    color: var(--clr-text-muted);
    font-family: var(--font-main);
    font-size: 0.8125rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-logout svg { width: 16px; height: 16px; }

.btn-logout:hover {
    background: rgba(255,71,87,0.12);
    border-color: rgba(255,71,87,0.3);
    color: #ff6b81;
}

/* Ana içerik alanı */
.app-page { display: flex; flex-direction: column; }

.app-main {
    flex: 1;
    padding: 32px 24px 48px;
    position: relative;
    z-index: 1;
}

.app-container {
    max-width: 1080px;
    margin: 0 auto;
    display: flex;
    flex-direction: row;
    align-items: start;
    gap: 24px;
    position: relative;
}

.app-column-left {
    width: 380px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.app-column-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ---------------------------------------------------------------
   6. Tur Göstergesi
   --------------------------------------------------------------- */
.round-indicator {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.round-badge {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--clr-primary);
    letter-spacing: 0.1em;
    background: rgba(108,99,255,0.12);
    padding: 4px 12px;
    border-radius: 99px;
    border: 1px solid rgba(108,99,255,0.25);
}

.phase-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--clr-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Aktif çalışma fazı */
.round-indicator.phase-work {
    border-color: rgba(255,71,87,0.3);
    background: rgba(255,71,87,0.06);
}
.round-indicator.phase-work .round-badge {
    background: rgba(255,71,87,0.15);
    border-color: rgba(255,71,87,0.3);
    color: var(--clr-work);
}
.round-indicator.phase-work .phase-label { color: var(--clr-work); }

/* Aktif dinlenme fazı */
.round-indicator.phase-rest {
    border-color: rgba(46,213,115,0.3);
    background: rgba(46,213,115,0.06);
}
.round-indicator.phase-rest .round-badge {
    background: rgba(46,213,115,0.15);
    border-color: rgba(46,213,115,0.3);
    color: var(--clr-rest);
}
.round-indicator.phase-rest .phase-label { color: var(--clr-rest); }

/* ---------------------------------------------------------------
   7. KART 1: Sayaç Kartı
   --------------------------------------------------------------- */
.timer-card {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-slow);
}

/* Kart üstü parlama efekti */
.timer-card::before {
    content: '';
    position: absolute;
    top: 0; left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(108,99,255,0.6), transparent);
}

/* Çalışma fazında kart rengi */
.timer-card.phase-work {
    border-color: rgba(255,71,87,0.2);
    box-shadow: var(--shadow-card), 0 0 60px rgba(255,71,87,0.08);
}
.timer-card.phase-work::before {
    background: linear-gradient(90deg, transparent, rgba(255,71,87,0.6), transparent);
}

/* Dinlenme fazında kart rengi */
.timer-card.phase-rest {
    border-color: rgba(46,213,115,0.2);
    box-shadow: var(--shadow-card), 0 0 60px rgba(46,213,115,0.08);
}
.timer-card.phase-rest::before {
    background: linear-gradient(90deg, transparent, rgba(46,213,115,0.6), transparent);
}

/* Hazırlık (prepare) fazında kart rengi — lavanta mor */
.timer-card.phase-prepare {
    border-color: rgba(162,155,254,0.25);
    box-shadow: var(--shadow-card), 0 0 60px rgba(162,155,254,0.1);
}
.timer-card.phase-prepare::before {
    background: linear-gradient(90deg, transparent, rgba(162,155,254,0.7), transparent);
}
.timer-card.phase-prepare .ring-progress {
    stroke: #a29bfe;
    filter: drop-shadow(0 0 10px #a29bfe);
}
.timer-card.phase-prepare .timer-time {
    text-shadow: 0 0 24px rgba(162,155,254,0.6);
}

/* Hazırlık fazında tur göstergesi */
.round-indicator.phase-prepare {
    border-color: rgba(162,155,254,0.3);
    background: rgba(162,155,254,0.06);
}
.round-indicator.phase-prepare .round-badge {
    background: rgba(162,155,254,0.15);
    border-color: rgba(162,155,254,0.35);
    color: #a29bfe;
}
.round-indicator.phase-prepare .phase-label { color: #a29bfe; }

/* Dairesel ilerleme halkası */
.timer-circle-wrapper {
    position: relative;
    width: 220px;
    height: 220px;
}

.timer-ring {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg); /* 12'den başlasın */
}

/* Arka plan halkası */
.ring-bg {
    fill: none;
    stroke: rgba(255,255,255,0.06);
    stroke-width: 8;
}

/* İlerleme halkası */
.ring-progress {
    fill: none;
    stroke: var(--clr-primary);
    stroke-width: 8;
    stroke-linecap: round;
    /* Çevre = 2π * 95 ≈ 596.9 */
    stroke-dasharray: 596.9;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s linear, stroke var(--transition);
    filter: drop-shadow(0 0 8px var(--clr-primary));
}

/* Faza göre halka rengi */
.timer-card.phase-work  .ring-progress { stroke: var(--clr-work);   filter: drop-shadow(0 0 10px var(--clr-work)); }
.timer-card.phase-rest  .ring-progress { stroke: var(--clr-rest);   filter: drop-shadow(0 0 10px var(--clr-rest)); }

/* Sayaç metni (halkının ortasında) */
.timer-display {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
}

.timer-phase {
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--clr-text-muted);
    text-transform: uppercase;
}

.timer-time {
    font-family: var(--font-mono);
    font-size: 4.5rem;
    font-weight: 700;
    line-height: 1;
    color: var(--clr-text);
    letter-spacing: -0.04em;
    transition: color var(--transition);
    /* Son 3 saniyede kırmızıya döner (JS ile sınıf eklenecek) */
}

.timer-card.phase-work  .timer-time { color: #fff; text-shadow: 0 0 24px rgba(255,71,87,0.5); }
.timer-card.phase-rest  .timer-time { color: #fff; text-shadow: 0 0 24px rgba(46,213,115,0.5); }
.timer-time.danger      { color: var(--clr-work) !important; animation: blink 0.5s ease-in-out infinite alternate; }

@keyframes blink {
    from { opacity: 1; }
    to   { opacity: 0.5; }
}

.timer-unit {
    font-size: 0.6875rem;
    color: var(--clr-text-dim);
    text-transform: lowercase;
    letter-spacing: 0.05em;
}

/* Kontrol butonları */
.timer-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

.ctrl-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: 1.5px solid var(--clr-border-light);
    background: rgba(255,255,255,0.06);
    color: var(--clr-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.ctrl-btn svg { width: 22px; height: 22px; }

.ctrl-btn:hover {
    background: var(--clr-primary);
    border-color: var(--clr-primary);
    transform: scale(1.08);
    box-shadow: 0 4px 20px var(--clr-primary-glow);
}

.ctrl-btn:active { transform: scale(0.96); }

/* Oynat butonu - daha büyük */
#btnStart {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--clr-primary), #8b5cf6);
    border-color: transparent;
    box-shadow: var(--shadow-btn);
}

#btnStart:hover {
    background: linear-gradient(135deg, #7b72ff, #9c6eff);
    box-shadow: 0 8px 32px rgba(108,99,255,0.55);
}

#btnStart svg { width: 26px; height: 26px; }

/* Duraklat butonu */
#btnPause {
    width: 64px; height: 64px;
    background: linear-gradient(135deg, #ffa502, #ff6348);
    border-color: transparent;
    box-shadow: 0 4px 20px rgba(255,165,2,0.4);
}

#btnPause:hover {
    box-shadow: 0 8px 32px rgba(255,165,2,0.55);
    background: linear-gradient(135deg, #ffb732, #ff7358);
}

/* Sıfırla butonu */
.ctrl-reset:hover {
    background: rgba(255,71,87,0.15) !important;
    border-color: rgba(255,71,87,0.4) !important;
    color: var(--clr-work) !important;
    box-shadow: 0 4px 20px rgba(255,71,87,0.2) !important;
}

/* ---------------------------------------------------------------
   8. KART 2: Ayarlar Kartı
   --------------------------------------------------------------- */
.settings-card {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: var(--shadow-card);
}

.settings-title {
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--clr-text-muted);
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--clr-border);
}

/* Ayar ızgarası */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

/* Geniş ayar (metronom) - tam genişlik */
.setting-item-wide {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

/* Tek ayar kartı */
.setting-item {
    background: var(--clr-surface-2);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: border-color var(--transition);
}

.setting-item:hover { border-color: var(--clr-border-light); }

/* Etiket satırı */
.setting-label-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.setting-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.work-dot   { background: var(--clr-work);   box-shadow: 0 0 6px var(--clr-work);   }
.rest-dot   { background: var(--clr-rest);   box-shadow: 0 0 6px var(--clr-rest);   }
.rounds-dot { background: var(--clr-rounds); box-shadow: 0 0 6px var(--clr-rounds); }
.prepare-dot{ background: #a29bfe;           box-shadow: 0 0 6px #a29bfe;           }
.metro-dot  { background: var(--clr-metro);  box-shadow: 0 0 6px var(--clr-metro);  }

.setting-label {
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--clr-text-muted);
    text-transform: uppercase;
}

/* Değer kontrolleri (+/-) */
.setting-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.setting-value-wrap {
    display: flex;
    align-items: baseline;
    gap: 4px;
    flex: 1;
    justify-content: center;
}

.setting-value {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--clr-text);
    line-height: 1;
    transition: all 0.15s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: inline-block;
}

/* Değer değiştiğinde zıplama animasyonu (JS ile class eklenecek) */
.setting-value.bounce {
    animation: valueBounce 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes valueBounce {
    from { transform: scale(0.8); opacity: 0.6; }
    to   { transform: scale(1);   opacity: 1;   }
}

.setting-unit {
    font-size: 0.75rem;
    color: var(--clr-text-dim);
    font-weight: 500;
}

/* +/- Butonları */
.adj-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1.5px solid var(--clr-border);
    background: rgba(255,255,255,0.04);
    color: var(--clr-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    flex-shrink: 0;
}

.adj-btn svg { width: 16px; height: 16px; }

.adj-btn:hover {
    background: rgba(108,99,255,0.15);
    border-color: rgba(108,99,255,0.4);
    color: var(--clr-primary);
    transform: scale(1.1);
}

.adj-btn:active { transform: scale(0.9); }

/* Metronom satırı için özel genişlik */
.metronome-controls { justify-content: center; width: 100%; }
.metronome-controls .setting-value-wrap { flex: none; min-width: 80px; justify-content: center; margin: 0 16px; }

/* BPM önayar satırı + önizleme butonu yan yana */
.bpm-presets-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 4px;
    width: 100%;
}

.bpm-presets {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.bpm-preset-btn {
    padding: 6px 14px;
    border-radius: 99px;
    border: 1.5px solid var(--clr-border);
    background: rgba(255,255,255,0.04);
    color: var(--clr-text-muted);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.bpm-preset-btn:hover {
    background: rgba(30,144,255,0.12);
    border-color: rgba(30,144,255,0.4);
    color: var(--clr-metro);
}

.bpm-preset-btn.active {
    background: rgba(30,144,255,0.18);
    border-color: var(--clr-metro);
    color: var(--clr-metro);
    box-shadow: 0 0 12px rgba(30,144,255,0.25);
}

/* ---- Metronom Önizleme Butonu ---- */
.btn-metro-preview {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 16px 7px 12px;
    border-radius: 99px;
    border: 1.5px solid var(--clr-border-light);
    background: rgba(255,255,255,0.05);
    color: var(--clr-text-muted);
    font-family: var(--font-main);
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn-metro-preview::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(30,144,255,0.15), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.btn-metro-preview:hover {
    border-color: rgba(30,144,255,0.5);
    color: var(--clr-metro);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(30,144,255,0.2);
}
.btn-metro-preview:hover::before { opacity: 1; }
.btn-metro-preview:active { transform: translateY(0); }

/* Aktif (çalan) durumu */
.btn-metro-preview.is-playing {
    border-color: var(--clr-metro);
    background: rgba(30,144,255,0.15);
    color: var(--clr-metro);
    box-shadow: 0 0 20px rgba(30,144,255,0.3);
    animation: metroGlow 1s ease-in-out infinite alternate;
}

@keyframes metroGlow {
    from { box-shadow: 0 0 12px rgba(30,144,255,0.25); }
    to   { box-shadow: 0 0 28px rgba(30,144,255,0.55); }
}

/* İkon alanı */
.metro-preview-icon {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}
.metro-preview-icon svg { width: 18px; height: 18px; }

/* Etiket */
.metro-preview-label { letter-spacing: 0.02em; }

/* Darbe noktaları (aktifken görünür) */
.metro-pulse-dots {
    display: none;
    align-items: center;
    gap: 3px;
    margin-left: 2px;
}
.metro-pulse-dots span {
    display: block;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--clr-metro);
    animation: dotBounce 0.6s ease-in-out infinite;
}
.metro-pulse-dots span:nth-child(2) { animation-delay: 0.15s; }
.metro-pulse-dots span:nth-child(3) { animation-delay: 0.30s; }

@keyframes dotBounce {
    0%, 100% { transform: scaleY(1);   opacity: 0.5; }
    50%       { transform: scaleY(2.2); opacity: 1;   }
}

/* Aktifken noktaları göster */
.btn-metro-preview.is-playing .metro-pulse-dots { display: flex; }

/* ---------------------------------------------------------------
   9. KART 3: Özet Kartı
   --------------------------------------------------------------- */
.summary-card {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-xl);
    padding: 28px 32px;
    box-shadow: var(--shadow-card);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

/* Özet istatistik bilgileri */
.summary-info {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.summary-stat {
    display: flex;
    align-items: center;
    gap: 12px;
}

.summary-icon {
    font-size: 1.5rem;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

.summary-value {
    font-family: var(--font-mono);
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--clr-text);
    line-height: 1.1;
    transition: all var(--transition);
}

.summary-label {
    font-size: 0.6875rem;
    color: var(--clr-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 500;
}

.summary-divider {
    width: 1px;
    height: 40px;
    background: var(--clr-border);
    flex-shrink: 0;
}

/* "Start Tabata" Ana Butonu */
.btn-start-tabata {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    background: linear-gradient(135deg, #ff4757, #ff6b35);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    font-family: var(--font-main);
    font-size: 1rem;
    font-weight: 800;
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition);
    box-shadow: var(--shadow-start);
    letter-spacing: 0.03em;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

.btn-start-tabata::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent 60%);
    opacity: 0;
    transition: opacity var(--transition);
}

.btn-start-tabata:hover::before { opacity: 1; }
.btn-start-tabata:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(255,71,87,0.6);
}
.btn-start-tabata:active { transform: translateY(0); }

.btn-start-icon {
    font-size: 1.125rem;
    transition: transform var(--transition);
}

.btn-start-tabata:hover .btn-start-icon { transform: scale(1.2); }

/* ---------------------------------------------------------------
   10. Tamamlanma Ekranı
   --------------------------------------------------------------- */
.completion-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15,14,26,0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: 24px;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.completion-card {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border-light);
    border-radius: var(--radius-xl);
    padding: 56px 48px;
    text-align: center;
    max-width: 400px;
    width: 100%;
    box-shadow: 0 24px 80px rgba(0,0,0,0.6);
    animation: popIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes popIn {
    from { transform: scale(0.75); opacity: 0; }
    to   { transform: scale(1);    opacity: 1; }
}

.completion-emoji {
    font-size: 4rem;
    margin-bottom: 20px;
    display: block;
    animation: trophyBounce 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s both;
}

@keyframes trophyBounce {
    from { transform: scale(0) rotate(-20deg); }
    to   { transform: scale(1) rotate(0); }
}

.completion-title {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, #ffd700, #ff6b35);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.completion-subtitle {
    color: var(--clr-text-muted);
    font-size: 0.9375rem;
    margin-bottom: 32px;
}

.completion-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 36px;
}

.comp-stat { display: flex; flex-direction: column; gap: 4px; }

.comp-stat-val {
    font-family: var(--font-mono);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--clr-text);
}

.comp-stat-label {
    font-size: 0.75rem;
    color: var(--clr-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.btn-new-workout {
    padding: 14px 36px;
    background: linear-gradient(135deg, var(--clr-primary), #8b5cf6);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: var(--font-main);
    font-size: 0.9375rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: var(--shadow-btn);
}

.btn-new-workout:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(108,99,255,0.55);
}

/* ---------------------------------------------------------------
   11. Responsive Tasarım
   --------------------------------------------------------------- */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
        gap: 20px;
    }

    .app-column-left,
    .app-column-right {
        width: 100%;
        flex-shrink: 1;
        gap: 20px;
    }

    .settings-grid { grid-template-columns: repeat(2, 1fr); }
    .setting-item-wide { grid-column: span 2; }

    .summary-card {
        flex-direction: column;
        gap: 20px;
    }

    .btn-start-tabata { width: 100%; justify-content: center; }

    .summary-info { justify-content: center; }

    .user-details { display: none; } /* Mobilde sadece avatar */
    .header-title span { display: none; }

    .adj-btn {
        width: 42px;
        height: 42px;
    }
}

@media (max-width: 576px) {
    .btn-logout span {
        display: none;
    }
    .btn-logout {
        padding: 8px;
        border-radius: 50%;
        width: 36px;
        height: 36px;
        justify-content: center;
    }
    .btn-logout svg {
        margin: 0;
    }
}

@media (max-width: 480px) {
    .settings-grid { grid-template-columns: 1fr; }
    .setting-item-wide { grid-column: auto; }

    .app-main { padding: 16px 16px 32px; }
    .timer-card { padding: 28px 16px; }
    .settings-card { padding: 24px 16px; }
    .summary-card { padding: 20px 16px; }
    .login-card { padding: 36px 24px 28px; }

    .summary-info { gap: 16px; }
    .summary-divider { display: none; }
}

/* ---------------------------------------------------------------
   12. Metronom Animasyonu (darbe efekti)
   --------------------------------------------------------------- */
@keyframes metroPulse {
    0%   { opacity: 1; transform: scale(1); }
    15%  { opacity: 0.6; transform: scale(0.96); }
    100% { opacity: 1; transform: scale(1); }
}

.timer-card.metro-beat .timer-circle-wrapper {
    animation: metroPulse 0.15s ease-out;
}

/* Tamamlanma yıldız parıltısı */
@keyframes starPop {
    0%   { transform: scale(0) rotate(0deg); opacity: 1; }
    100% { transform: scale(3) rotate(360deg); opacity: 0; }
}