:root {
    /* Dark Mode */
    --bg-color: #0a0a0a;
    --text-color: #ffffff;
    --card-bg: #151515;
    --card-text: #e0e0e0;
    --divider-color: #000000;
    --accent-color: #1db954; 
    --panel-bg: rgba(20, 20, 20, 0.85);
    --input-bg: rgba(40, 40, 40, 0.6);
    --input-border: #333333;
    --focus-glow: 0 0 20px rgba(255, 255, 255, 0.7);
}

[data-theme="light"] {
    /* Light Mode */
    --bg-color: #f0f4f8;
    --text-color: #111111;
    --card-bg: #ffffff;
    --card-text: #111111;
    --divider-color: #cccccc;
    --accent-color: #1db954;
    --panel-bg: rgba(255, 255, 255, 0.9);
    --input-bg: rgba(240, 240, 240, 0.8);
    --input-border: #dddddd;
    --focus-glow: 0 0 20px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    transition: background-color 0.4s ease, color 0.4s ease;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

/* =========================================================
   HAYALET (IDLE) MODU - SİNEMATİK BÜYÜME VE TAM KARARMA
   ========================================================= */
.top-bar, 
.mode-selector, 
#pomodoro-controls, 
.floating-wrapper, 
.modern-footer, 
.label {
    transition: opacity 1.2s ease, transform 1.2s ease;
}

/* Sadece Saat ve Hedef dışındaki her şey %100 görünmez olur */
body.idle .top-bar, 
body.idle .mode-selector, 
body.idle #pomodoro-controls, 
body.idle .floating-wrapper, 
body.idle .modern-footer, 
body.idle .label {
    opacity: 0; 
    pointer-events: none; 
}

/* =========================================================
   ÜST BAR VE LOGO ALANI
   ========================================================= */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2vh 3vw;
    z-index: 10;
}

.logo-area {
    display: flex;
    align-items: center;
}

.site-logo {
    height: 45px; 
    width: auto;
    border-radius: 8px; 
    box-shadow: 0 2px 10px rgba(0,0,0,0.3); 
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-left: auto;
}

.icon-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    transition: transform 0.2s ease;
}

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

/* Tema Değiştirici */
.theme-switch-wrapper {
    display: flex;
    align-items: center;
    gap: 1vw;
}

.theme-label {
    font-size: 1rem;
    font-weight: 600;
}

.theme-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.theme-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #444;
    transition: .4s;
    border-radius: 34px;
    box-shadow: inset 0 0 5px rgba(0,0,0,0.5);
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--accent-color);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

/* Ana İçerik */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 1vh;
    padding-bottom: 5vh; 
}

.pomodoro-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    margin-bottom: 4vh;
    width: 100%;
}

.mode-selector {
    display: flex;
    gap: 15px;
    background-color: var(--input-bg);
    padding: 5px;
    border-radius: 30px;
    border: 1px solid var(--input-border);
}

.mode-btn {
    background: transparent;
    border: none;
    color: var(--text-color);
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: bold;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s, color 0.3s;
}

.mode-btn.active {
    background: var(--text-color);
    color: var(--bg-color);
}

/* Nefes Alan Hedef (Saatle Birlikte Büyüyecek) */
#focus-display {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    animation: breathe 4s infinite ease-in-out;
    text-shadow: var(--focus-glow);
    margin: 5px 0;
    text-align: center;
    cursor: pointer;
    transition: transform 1.2s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body.idle #focus-display {
    transform: scale(1.1); /* Saat büyürken hedef de hafifçe devleşsin */
}

@keyframes breathe {
    0%, 100% { opacity: 0.5; transform: scale(0.98); }
    50% { opacity: 1; transform: scale(1.02); }
}

.hidden {
    display: none !important;
}

/* =========================================================
   MİNİMALİST POMODORO KONTROLLERİ
   ========================================================= */
#pomodoro-controls {
    display: flex;
    gap: 15px;
}

.ctrl-btn {
    padding: 10px 20px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.minimal-btn {
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--input-border);
    opacity: 0.7;
}

.minimal-btn:hover {
    opacity: 1;
    background: var(--text-color);
    color: var(--bg-color);
    transform: translateY(-2px);
}

.danger-border {
    border-color: #e74c3c;
    color: #e74c3c;
}

.danger-border:hover {
    background: #e74c3c;
    color: white;
}

/* =========================================================
   DEVASA FLIP CLOCK
   ========================================================= */
.clock-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2vw;
    width: 100%;
    /* Sinematik büyüme animasyonu */
    transition: transform 1.2s cubic-bezier(0.25, 0.8, 0.25, 1);
    transform-origin: center center;
}

/* EKRANIN %95'İNİ KAPLAYAN HAYALET MODU BÜYÜMESİ */
body.idle .clock-container {
    /* Mevcut 88vw olan genişliği %95 yapmak için 1.08 katsayısı kullanılır */
    transform: scale(1.08); 
}

.time-section {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.flip-card {
    position: relative;
    display: inline-block;
    width: 28vw; 
    height: 35vw; 
    font-size: 21vw; 
    font-weight: 800;
    border-radius: 1.5vw;
    perspective: 1200px;
    box-shadow: 0 1.5vw 4vw rgba(0,0,0,0.6);
    text-align: center;
    background-color: var(--card-bg);
}

.top, .bottom, .flip-leaf {
    position: absolute;
    left: 0;
    width: 100%;
    height: 50%;
    overflow: hidden;
    background-color: var(--card-bg);
    color: var(--card-text);
}

.top {
    top: 0;
    line-height: 35vw;
    border-top-left-radius: 1.5vw;
    border-top-right-radius: 1.5vw;
    border-bottom: 2px solid var(--divider-color); 
}

.bottom {
    bottom: 0;
    line-height: 0;
    border-bottom-left-radius: 1.5vw;
    border-bottom-right-radius: 1.5vw;
}

.flip-leaf {
    top: 0;
    line-height: 35vw;
    border-top-left-radius: 1.5vw;
    border-top-right-radius: 1.5vw;
    transform-origin: bottom;
    z-index: 5;
    animation: flipDown 0.4s ease-in-out forwards;
    backface-visibility: hidden;
    border-bottom: 2px solid var(--divider-color);
}

@keyframes flipDown {
    0% { transform: rotateX(0deg); }
    100% { transform: rotateX(-180deg); }
}

.label {
    margin-top: 2vw;
    font-size: 2vw;
    font-weight: 800;
    letter-spacing: 0.8vw;
    opacity: 0.5;
    text-transform: uppercase;
}

/* =========================================================
   KAPSÜL MENÜ (HAMBURGER SPEED DIAL)
   ========================================================= */
.floating-wrapper {
    position: fixed;
    right: 2vw;
    bottom: 8vh;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    z-index: 50;
}

.fab-menu {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 15px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.fab-menu.open {
    opacity: 1;
    pointer-events: all;
    transform: translateY(0);
}

.fab-item {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    padding: 12px 20px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    text-align: right;
    transition: transform 0.2s, background-color 0.3s;
}

.fab-item:hover {
    transform: scale(1.05);
    background-color: var(--text-color);
    color: var(--bg-color);
}

.main-fab-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(0,0,0,0.4);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.3s ease, background-color 0.3s;
}

.main-fab-btn:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
}

.main-fab-btn.active {
    transform: rotate(90deg);
}

/* Glassmorphism Paneller */
.glass-panel {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.side-panel {
    position: fixed;
    top: 0;
    right: -450px;
    width: 450px;
    height: 100vh;
    background-color: var(--panel-bg);
    box-shadow: -5px 0 25px rgba(0,0,0,0.5);
    transition: right 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    z-index: 100;
    display: flex;
    flex-direction: column;
    padding: 25px;
}

.side-panel.open {
    right: 0;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 2rem;
    cursor: pointer;
    opacity: 0.7;
}

.close-btn:hover {
    color: var(--accent-color);
    opacity: 1;
}

/* SPOTIFY WRAPPER */
.spotify-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.spotify-wrapper iframe {
    flex: 1;
}

#note-area {
    flex: 1;
    background-color: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    padding: 15px;
    font-family: inherit;
    font-size: 1.1rem;
    resize: none;
    outline: none;
    margin-bottom: 15px;
}

.action-btn {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--text-color);
    padding: 15px;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    transition: all 0.3s;
}

.action-btn:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
}

/* Modallar */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    z-index: 200;
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background-color: var(--panel-bg);
    width: 90%;
    max-width: 450px;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 15px 50px rgba(0,0,0,0.6);
    transform: translateY(-20px);
    transition: transform 0.3s;
}

.modal-overlay.open .modal-content {
    transform: translateY(0);
}

.text-center {
    text-align: center;
}

.modal-content input {
    width: 100%;
    background-color: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    padding: 15px;
    border-radius: 8px;
    outline: none;
    font-family: inherit;
    font-size: 1.2rem;
    text-align: center;
    margin-bottom: 20px;
}

.modal-content input:focus {
    border-color: var(--text-color);
}

.submit-btn {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--text-color);
    width: 100%;
    padding: 15px;
    border-radius: 8px;
    font-weight: bold;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s;
}

.submit-btn:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
}

/* İmza */
.modern-footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
    padding: 15px 0;
    background: transparent;
    pointer-events: none;
}

.signature-text {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-color);
    text-transform: uppercase;
    letter-spacing: 0.3em;
    opacity: 0.4; 
}

/* =========================================================
   MOBİL (RESPONSIVE)
   ========================================================= */
@media (max-width: 768px) {
    body {
        overflow-y: auto;
    }
    
    .top-bar {
        padding: 2vh 5vw;
    }
    
    .pomodoro-header {
        margin-top: 2vh;
        margin-bottom: 4vh;
    }
    
    #focus-display {
        font-size: 1.5rem;
    }
    
    .clock-container {
        flex-direction: column;
        gap: 8vh;
        padding-bottom: 10vh;
    }
    
    .flip-card {
        width: 75vw;
        height: 80vw;
        font-size: 60vw;
    }
    
    .top, .flip-leaf {
        line-height: 80vw;
    }
    
    .label {
        font-size: 6vw;
        margin-top: 4vw;
    }
    
    .floating-wrapper {
        bottom: 5vh;
        right: 5vw;
    }
    
    .side-panel {
        width: 100%;
        right: -100%;
    }
    
    .modern-footer {
        position: relative;
        margin-top: 30px;
    }
}