/* ==========================================================================
   1. CSS VARIABLES & THEMING (The Color Palette)
   ========================================================================== */
:root {
    /* Core Typography & Spacing */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --border-radius-lg: 24px;
    --border-radius-md: 16px;
    --border-radius-sm: 8px;
}

/* --- DARK THEME (Sleek, Deep Charcoal, High Contrast) --- */
.dark-theme {
    --bg-color: #050505;
    --surface-color: rgba(30, 30, 30, 0.6);
    --surface-hover: rgba(50, 50, 50, 0.8);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --accent-color: #ffffff;
    --accent-text: #000000;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --glass-blur: blur(20px);
}

/* --- LIGHT THEME (Pearl White, Clean, Editorial) --- */
.light-theme {
    --bg-color: #f4f4f5;
    --surface-color: rgba(255, 255, 255, 0.7);
    --surface-hover: rgba(255, 255, 255, 1);
    --border-color: rgba(0, 0, 0, 0.05);
    --text-primary: #09090b;
    --text-secondary: #71717a;
    --accent-color: #09090b;
    --accent-text: #ffffff;
    --danger-color: #dc2626;
    --success-color: #059669;
    --glass-blur: blur(20px);
}

/* ==========================================================================
   2. GLOBAL RESETS & TYPOGRAPHY
   ========================================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    transition: background-color var(--transition), color var(--transition);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

button {
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
}

input {
    font-family: inherit;
    outline: none;
}

/* Core Utility: Hides elements smoothly */
.hidden {
    display: none !important;
    opacity: 0;
    pointer-events: none;
}

.view-state {
    animation: fadeIn 0.5s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   3. LOGIN SCREEN (Auth Card)
   ========================================================================== */
#login-view {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.auth-card {
    background: var(--surface-color);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    text-align: center;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.logo { font-size: 2rem; font-weight: 300; letter-spacing: -1px; margin-bottom: 5px; }
.logo span { font-weight: 700; }
.subtitle { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 30px; }

/* Avatar Selection */
.user-toggle-grid { display: flex; gap: 20px; justify-content: center; }
.user-choice { cursor: pointer; }
.user-choice:hover .avatar-placeholder { border-color: var(--accent-color); color: var(--accent-color); }

.avatar-placeholder {
    width: 80px; height: 80px;
    background: rgba(0,0,0,0.05);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 10px auto;
    color: var(--text-secondary);
    transition: var(--transition);
}

/* Password Input Group */
.input-group { display: flex; flex-direction: column; gap: 15px; }
#login-greeting { font-weight: 400; margin-bottom: 10px; }

input[type="password"], input[type="text"], input[type="datetime-local"] {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 16px;
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    width: 100%;
}
input:focus { border-color: var(--accent-color); }

#login-btn {
    background: var(--accent-color);
    color: var(--accent-text);
    border: none;
    padding: 16px;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    font-size: 1rem;
}
#login-btn:hover { opacity: 0.9; transform: translateY(-2px); }

.text-btn { background: none; border: none; color: var(--text-secondary); font-size: 0.9rem; margin-top: 10px; }
.text-btn:hover { color: var(--text-primary); }

/* ==========================================================================
   4. TOP NAVIGATION & USER SWITCHER (Dashboard)
   ========================================================================== */
#top-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: var(--surface-color);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
}

.logo-small { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 1.1rem; }

/* The Master Toggle (iOS Segmented Control Style) */
.user-switcher {
    display: flex;
    background: rgba(150, 150, 150, 0.1);
    border-radius: 30px;
    padding: 4px;
}
.toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 6px 16px;
    border-radius: 30px;
    font-weight: 500;
    font-size: 0.9rem;
}
.toggle-btn.active { background: var(--surface-hover); color: var(--text-primary); box-shadow: 0 2px 5px rgba(0,0,0,0.1); }

.nav-actions { display: flex; gap: 10px; }
.icon-btn { background: none; border: none; color: var(--text-secondary); display: flex; align-items: center; padding: 5px; }
.icon-btn:hover { color: var(--text-primary); }

/* ==========================================================================
   5. MAIN DASHBOARD LAYOUT & WIDGETS
   ========================================================================== */
#dashboard-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 30px 20px 80px 20px;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.widget {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 25px;
}
.widget-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.widget-header h2 { font-size: 1.3rem; font-weight: 600; }

/* HERO SECTION */
#hero-section { display: flex; justify-content: space-between; align-items: flex-end; flex-wrap: wrap; gap: 20px; }
#greeting-text { font-size: 2rem; font-weight: 300; letter-spacing: -1px; }
blockquote { margin-top: 15px; font-style: italic; color: var(--text-secondary); border-left: 2px solid var(--accent-color); padding-left: 15px; }

.action-btn {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--surface-hover); color: var(--text-primary);
    text-decoration: none; padding: 12px 20px;
    border-radius: var(--border-radius-md); font-weight: 500; font-size: 0.9rem;
    border: 1px solid var(--border-color);
}
.action-btn:hover { border-color: var(--accent-color); }

/* APP LAUNCHER GRID */
.app-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; }
@media (min-width: 600px) { .app-grid { grid-template-columns: repeat(4, 1fr); } }

.app-tile {
    position: relative;
    background: transparent; border: 1px solid var(--border-color);
    padding: 20px; border-radius: var(--border-radius-md);
    color: var(--text-primary); display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.app-tile i { color: var(--text-secondary); transition: var(--transition); }
.app-tile:hover { background: var(--surface-hover); border-color: var(--text-secondary); }
.app-tile:hover i { color: var(--accent-color); transform: scale(1.1); }
.app-tile:active { transform: scale(0.95); }

.disabled-tile {
    opacity: 0.5;
    cursor: not-allowed;
    border-style: dashed;
}

.disabled-tile:hover {
    background: transparent;
    border-color: var(--border-color);
    transform: none;
}

.disabled-tile:hover i {
    color: var(--text-secondary);
    transform: none;
}

/* The visual 'Soon' badge */
.coming-soon-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background: var(--text-primary);
    color: var(--bg-color);
    font-size: 0.65rem;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: 12px;
    text-transform: uppercase;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    z-index: 2;
}

/* ==========================================================================
   6. TASKS & GOALS LISTS
   ========================================================================== */
/* Time Filters */
.filters { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 5px; }
.filters::-webkit-scrollbar { display: none; }
.filter-btn {
    background: transparent; border: 1px solid var(--border-color);
    color: var(--text-secondary); padding: 6px 12px;
    border-radius: 20px; font-size: 0.8rem; white-space: nowrap;
}
.filter-btn.active { background: var(--text-primary); color: var(--bg-color); border-color: var(--text-primary); }

/* Input Row for adding items */
.input-row { display: flex; gap: 10px; margin-bottom: 20px; flex-wrap: wrap; }
.input-row input[type="text"] { flex: 2; min-width: 200px; }
.input-row input[type="datetime-local"] { flex: 1; min-width: 150px; }
.add-btn {
    background: var(--surface-hover); color: var(--text-primary);
    border: 1px solid var(--border-color); padding: 0 20px;
    border-radius: var(--border-radius-md); display: flex; align-items: center; gap: 5px;
}
.add-btn:hover { background: var(--text-primary); color: var(--bg-color); }

/* List Layout */
.list-container { display: flex; flex-direction: column; gap: 10px; }
.empty-state, .loading-text { text-align: center; color: var(--text-secondary); padding: 20px; font-style: italic; }

.list-item {
    display: flex; align-items: center; gap: 15px;
    padding: 15px; background: transparent;
    border-bottom: 1px solid var(--border-color);
    animation: fadeIn 0.3s ease;
}
.list-item:last-child { border-bottom: none; }

/* Custom Checkbox */
.task-checkbox {
    appearance: none; width: 22px; height: 22px;
    border: 2px solid var(--text-secondary); border-radius: 6px;
    cursor: pointer; position: relative; transition: var(--transition);
}
.task-checkbox:checked { background: var(--success-color); border-color: var(--success-color); }
.task-checkbox:checked::after {
    content: '✓'; position: absolute; color: white;
    font-size: 14px; top: 50%; left: 50%; transform: translate(-50%, -50%);
}

.item-details { flex: 1; display: flex; flex-direction: column; gap: 4px; }
.item-title { font-weight: 500; transition: var(--transition); }
.item-title.done { text-decoration: line-through; color: var(--text-secondary); }
.item-time { font-size: 0.8rem; color: var(--text-secondary); display: flex; align-items: center; gap: 4px; }
.item-time i { width: 12px; height: 12px; }

.delete-btn {
    background: none; border: none; color: var(--text-secondary);
    padding: 8px; border-radius: 50%;
}
.delete-btn:hover { color: var(--danger-color); background: rgba(255,0,0,0.1); }

/* Goal Countdowns */
.goal-item .item-title { font-size: 1.1rem; }
.countdown-timer { font-size: 0.9rem; color: var(--accent-color); font-weight: 500; display: flex; align-items: center; gap: 6px; }
.countdown-timer i { width: 14px; height: 14px; }
.achieved { color: var(--success-color); display: flex; align-items: center; gap: 5px; }

/* ==========================================================================
   7. RESPONSIVE ADJUSTMENTS
   ========================================================================== */
@media (max-width: 600px) {
    .widget { padding: 20px 15px; border-radius: var(--border-radius-md); }
    #hero-section { flex-direction: column; align-items: flex-start; }
    .action-btn { width: 100%; justify-content: center; }
    .input-row { flex-direction: column; }
    .add-btn { padding: 16px; justify-content: center; }
}


/* ==========================================================================
   8. MODULE VIEWER (IFRAME SYSTEM)
   ========================================================================== */
#module-view {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--bg-color);
    z-index: 9999;
    display: flex;
    flex-direction: column;
}

.module-top-bar {
    height: 60px;
    min-height: 60px;
    /* Uses your dynamic theme variables & frosted glass! */
    background: var(--surface-color);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    
    display: flex;
    align-items: center;
    padding: 0 20px;
}

.back-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.back-btn:hover {
    color: var(--text-secondary);
}

#module-title {
    margin-left: auto;
    font-weight: 600;
    color: var(--text-primary);
}

#module-frame {
    flex: 1;
    width: 100%;
    height: 100%;
    border: none;
    background: var(--bg-color);
}