/* style.css */
:root {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --danger: #ef4444;
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: 0;
    transition: background-color 0.3s, color 0.3s;
    padding-top: env(safe-area-inset-top); 
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    background-color: var(--card-bg);
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    gap: 1rem;
    margin-bottom: 2rem;
    padding-top: max(1rem, env(safe-area-inset-top)); 
}

nav .nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

nav a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

button, .btn {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    text-decoration: none;
    display: inline-block;
}

button:hover, .btn:hover { background-color: var(--primary-hover); }

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
    cursor: pointer;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    text-decoration: none;
    display: inline-block;
    transition: all 0.2s ease;
}

.btn-outline:hover {
    background-color: rgba(128, 128, 128, 0.2);
    border-color: var(--text-muted);
}

.btn-danger { 
    background-color: transparent; 
    border: 1px solid var(--border);
    color: var(--danger); 
    cursor: pointer;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    text-decoration: none;
    display: inline-block;
}

.btn-danger:hover { background-color: rgba(239, 68, 68, 0.1); }

input {
    width: 100%;
    padding: 0.75rem;
    margin-top: 0.25rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background-color: var(--bg-color);
    color: var(--text-main);
    box-sizing: border-box;
    font-size: 1rem;
}

.exercise-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.flex-between { display: flex; justify-content: space-between; align-items: center; }

@media (max-width: 600px) {
    nav { flex-direction: column; text-align: center; }
    nav .nav-links { justify-content: center; width: 100%; }
    .exercise-row { gap: 0.5rem; }
    .container { padding: 1rem; }
}

.modal {
    display: none; 
    position: fixed; 
    z-index: 1000; 
    left: 0; top: 0;
    width: 100%; height: 100%;
    background-color: rgba(0,0,0,0.8);
}

.modal-content {
    background-color: var(--card-bg);
    margin: 10% auto;
    padding: 20px;
    width: 80%;
    max-width: 600px;
    border-radius: 8px;
    position: relative;
}

.close-modal {
    position: absolute;
    top: 10px; right: 15px;
    font-size: 24px; cursor: pointer; color: var(--text-main);
}

/* ==========================================
   MANAGE EXERCISES (Rich Text & Filters)
   ========================================== */
.rich-text-content p { margin-top: 0; margin-bottom: 0.75rem; }
.rich-text-content p:last-child { margin-bottom: 0; }
.rich-text-content ul, .rich-text-content ol { margin-top: 0.25rem; margin-bottom: 0.75rem; padding-left: 1.5rem; }
.rich-text-content li { margin-bottom: 0.25rem; }
.rich-text-content sup, .rich-text-content .citation-104 { display: none; }

.filter-form select {
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-size: 0.9rem;
    cursor: pointer;
}

/* ==========================================
   CALENDAR STYLES
   ========================================== */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}
.calendar-header {
    background: var(--card-bg);
    padding: 0.5rem;
    text-align: center;
    font-weight: bold;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
}
.calendar-day {
    background: var(--card-bg);
    min-height: 100px;
    padding: 0.5rem;
    position: relative;
    cursor: pointer;
    transition: background-color 0.2s;
}
.calendar-day:hover {
    background: var(--bg-color);
}
.calendar-day.empty {
    background: rgba(0,0,0,0.02);
    cursor: default;
}
[data-theme="dark"] .calendar-day.empty {
    background: rgba(255,255,255,0.02);
}
.calendar-day.today {
    background: rgba(59, 130, 246, 0.1);
    border-top: 3px solid var(--primary);
}
.date-num {
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: inline-block;
    width: 24px;
    height: 24px;
    text-align: center;
    line-height: 24px;
    border-radius: 50%;
}
.calendar-day.today .date-num {
    background: var(--primary);
    color: white;
}
.plan-badge {
    font-size: 0.7rem;
    padding: 2px 4px;
    border-radius: 4px;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.plan-prog { background: var(--primary); color: white; }
.plan-ex { background: #8b5cf6; color: white; }
.plan-completed { background: #16a34a; color: white; text-decoration: line-through; opacity: 0.8; }

.calendar-day.other-month {
    opacity: 0.35;
    background: rgba(0, 0, 0, 0.05);
    cursor: default;
}
[data-theme="dark"] .calendar-day.other-month {
    background: rgba(0, 0, 0, 0.2);
}
.calendar-day.other-month .date-num {
    color: var(--text-muted);
}

/* ==========================================
   PROGRAM BUILDER: RESPONSIVE TABLE & DRAG
   ========================================== */
.responsive-table {
    width: 100%;
    border-collapse: collapse;
}
.responsive-table th {
    padding: 0.75rem 0.5rem;
    border-bottom: 2px solid var(--border);
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: left;
}
.responsive-table td {
    padding: 0.75rem 0.5rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--border);
}
.equip-container {
    font-size: 0.75rem; 
    font-weight: normal; 
    display: flex; 
    gap: 8px; 
    align-items: center; 
    color: var(--text-muted); 
    flex-wrap: wrap;
}

.drag-handle {
    cursor: grab;
    user-select: none;
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-muted);
}
.drag-handle:active {
    cursor: grabbing;
}
.sortable-ghost {
    opacity: 0.4;
    background-color: var(--border);
}

@media (max-width: 768px) {
    .responsive-table thead {
        display: none;
    }
    .responsive-table, .responsive-table tbody, .responsive-table tr, .responsive-table td {
        display: block;
        width: 100%;
        box-sizing: border-box;
    }
    .responsive-table tr {
        margin-bottom: 1.25rem;
        border: 1px solid var(--border);
        border-radius: 8px;
        padding: 0.75rem;
        background: var(--bg-color); 
        box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    }
    .responsive-table tr#empty-table-msg {
        background: transparent;
        border: 2px dashed var(--border);
        box-shadow: none;
    }
    .responsive-table td {
        display: flex;
        flex-direction: column;
        padding: 0.5rem 0;
        border-bottom: 1px dashed var(--border);
        text-align: left;
    }
    .responsive-table td:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
    .responsive-table td::before {
        content: attr(data-label);
        font-weight: bold;
        font-size: 0.75rem;
        color: var(--primary);
        margin-bottom: 0.25rem;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }
    .responsive-table td.drag-handle {
        flex-direction: row;
        justify-content: center;
        background-color: rgba(128, 128, 128, 0.1);
        border-bottom: 1px solid var(--border);
        padding: 0.4rem;
        margin: -0.75rem -0.75rem 0.5rem -0.75rem;
        border-radius: 8px 8px 0 0;
    }
    .responsive-table td.drag-handle::before {
        display: none;
    }
    #empty-table-msg td::before {
        display: none;
    }
    #empty-table-msg td {
        align-items: center;
        text-align: center !important;
        padding: 2rem 1rem !important;
        border: none;
    }
    .responsive-table td input[type="text"],
    .responsive-table td input[type="number"] {
        width: 100% !important;
        box-sizing: border-box;
    }
    .mobile-full-btn {
        width: 100% !important;
        margin-top: 0.25rem;
    }
}

/* ==========================================
   LOGIN PAGE STYLES
   ========================================== */
.split-layout {
    display: flex;
    width: 100%;
    min-height: 100vh;
}
.hero-side {
    flex: 1;
    background: linear-gradient(rgba(15, 23, 42, 0.7), rgba(15, 23, 42, 0.9)), url('https://images.unsplash.com/photo-1534438327276-14e5300c3a48?q=80&w=1470&auto=format&fit=crop') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    padding: 2rem;
}
.hero-content {
    max-width: 500px;
    text-align: center;
}
.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 800;
    letter-spacing: -1px;
}
.hero-content p {
    font-size: 1.2rem;
    opacity: 0.9;
    line-height: 1.6;
}
.form-side {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background-color: var(--bg-color);
}
.login-wrapper {
    width: 100%;
    max-width: 420px;
}
.login-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2.5rem 2rem;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
}
.login-card h2 {
    text-align: center;
    margin-top: 0;
    margin-bottom: 2rem;
    font-size: 1.8rem;
    color: var(--text-main);
}
.login-input {
    width: 100%;
    padding: 0.85rem 1rem;
    margin-top: 0.4rem;
    margin-bottom: 1.25rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background-color: var(--bg-color);
    color: var(--text-main);
    box-sizing: border-box;
    font-size: 1rem;
    transition: border-color 0.2s;
}
.login-input:focus {
    outline: none;
    border-color: var(--primary);
}
.login-btn {
    width: 100%;
    padding: 0.85rem;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 8px;
    margin-top: 0.5rem;
}

/* Mobile overrides for Login Page */
@media (max-width: 900px) {
    .split-layout {
        flex-direction: column;
        min-height: auto;
    }
    .hero-side {
        flex: none;
        min-height: fit-content; 
        padding: 1.5rem 1rem 0.5rem 1rem; 
    }
    .hero-content h1 {
        font-size: 1.5rem;
        margin-bottom: 0.2rem;
    }
    .hero-content p {
        font-size: 0.8rem;
        margin-bottom: 0;
    }
    .form-side {
        flex: none;
        align-items: flex-start;
        padding: 0.5rem 1rem 2rem 1rem; 
    }
    .login-wrapper {
        margin: 0 auto; 
    }
    .login-card {
        padding: 1.25rem 1rem;
    }
}

/* ==========================================
   APP-LIKE NAVIGATION STYLING
   ========================================== */
.app-nav {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 0 1.5rem;
    display: flex;
    flex-direction: column;
    margin-bottom: 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-brand {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px; 
}

.burger-menu {
    display: none; 
    background: none;
    border: none;
    color: var(--primary);
    font-size: 1.8rem;
    cursor: pointer;
    padding: 0;
}

.nav-links-container {
    display: flex;
    justify-content: space-between;
    flex-direction: row;
    width: 100%;
    padding-bottom: 0;
}

.nav-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.app-nav a {
    text-decoration: none;
    color: var(--text-main);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: background-color 0.2s;
}

.app-nav a:hover {
    background-color: var(--bg-color);
    color: var(--primary);
}

.logout-link {
    color: var(--danger) !important;
}

/* ==========================================
   STRICT MOBILE RESPONSIVE LAYOUT & WORKOUT LOGGER FIX
   ========================================== */
@media (max-width: 900px) {
    .app-nav {
        padding-top: max(35px, env(safe-area-inset-top)); 
        padding-left: 1rem;
        padding-right: 1rem;
        padding-bottom: 0;
    }
    
    .burger-menu {
        display: block; 
    }
    
    .nav-links-container {
        display: none; 
        flex-direction: column;
        padding-bottom: 1rem;
        animation: fadeIn 0.2s ease-in-out;
    }
    
    .nav-links-container.show {
        display: flex; 
    }
    
    .nav-group {
        flex-direction: column;
        align-items: stretch;
        gap: 0.25rem;
    }
    
    .right-group {
        margin-top: 0.75rem;
        border-top: 1px solid var(--border);
        padding-top: 0.75rem;
    }
    
    .app-nav a {
        padding: 0.75rem 1rem; 
        font-size: 1rem;
    }

    /* Force Reps, Weight, and Button into 3 columns side-by-side */
    .exercise-row {
        display: grid !important;
        grid-template-columns: 1fr 1fr auto !important; 
        gap: 0.5rem !important;
        align-items: end !important; 
        background: rgba(128, 128, 128, 0.08);
        padding: 0.75rem;
        border-radius: 6px;
        margin-bottom: 0.5rem;
    }

    /* Force Set Header / Label across the top spanning all columns */
    .exercise-row > div:has(> label), 
    .exercise-row .set-header {
        grid-column: 1 / -1 !important;
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 0.25rem;
    }

    .exercise-row label {
        font-size: 0.75rem !important; 
    }

    /* Force Reps and Weight input boxes to be identically sized and prevent Android overflow */
    .exercise-row input[type="number"], 
    .exercise-row input[type="text"] {
        width: 100% !important;
        min-width: 0 !important;
        max-width: none !important;
        height: 42px !important;
        padding: 0.5rem !important;
        font-size: 1rem !important;
        text-align: center;
        box-sizing: border-box !important;
        margin-bottom: 0 !important;
    }

    /* Force the remove button to stay small and fit in the 3rd column */
    .exercise-row > button, 
    .exercise-row > a.btn-danger,
    .exercise-row > .btn {
        grid-column: auto !important;
        width: auto !important;
        height: 42px !important;
        margin-bottom: 0 !important;
        display: flex !important;
        align-items: center;
        justify-content: center;
    }
}

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

.exercise-actions {
    display: flex;
    align-items: center;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #1e293b;
}

.save-single-exercise-btn {
    background-color: #3b82f6;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.save-single-exercise-btn:active {
    background-color: #2563eb;
}

/* ==========================================
   PROGRESS PAGE STYLES
   ========================================== */
.progress-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; flex-wrap: wrap; gap: 1rem; }
.progress-header h2 { margin: 0; }
.user-select { padding: 0.5rem 1rem; border-radius: 6px; border: 1px solid var(--border); background: var(--bg-color); color: var(--primary); font-weight: bold; cursor: pointer; }

/* Grid layout ensures pixel-perfect equal widths */
.filter-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 1rem; align-items: flex-end; }
.filter-group, .filter-group.small, .filter-btn-wrapper { width: 100%; }
.filter-label { font-size: 0.85rem; color: var(--text-muted); display: block; margin-bottom: 0.25rem; }
.filter-input { width: 100%; padding: 0.75rem; margin: 0; border-radius: 6px; border: 1px solid var(--border); background: var(--bg-color); color: var(--text-main); box-sizing: border-box; }
.filter-btn-wrapper button { width: 100%; padding: 0.75rem 1.25rem; }

.card-edit { border: 2px solid var(--primary); }
.card-edit h4 { margin-top: 0; color: var(--primary); }
.card-danger { border: 2px solid var(--danger); background: rgba(239, 68, 68, 0.03); }
.card-danger h4 { margin-top: 0; color: var(--danger); }
.card-danger p { margin-bottom: 1rem; color: var(--text-main); }
.action-buttons { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1rem; }
.action-buttons .btn, .action-buttons button { flex: 1; text-align: center; }

.history-title { text-align: center; margin-top: 0; margin-bottom: 1.5rem; }
.date-group { padding-bottom: 1.5rem; margin-bottom: 1.5rem; border-bottom: 2px solid var(--border); }
.date-header { font-size: 1.25rem; color: var(--primary); display: block; margin-bottom: 1rem; font-weight: bold; }

.exercise-block { background: rgba(128,128,128,0.05); border: 1px solid var(--border); border-radius: 8px; padding: 0.75rem; margin-bottom: 1rem; }
.exercise-header { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; margin-bottom: 0.75rem; }
.exercise-title { color: var(--text-main); font-size: 1.05rem; font-weight: bold; }
.equip-badge { font-size: 0.75rem; color: var(--text-muted); background: var(--bg-color); padding: 0.2rem 0.5rem; border-radius: 12px; text-transform: uppercase; letter-spacing: 0.5px; }

.pill-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.5rem; }
.set-pill { background: var(--bg-color); border: 1px solid var(--border); border-radius: 6px; padding: 0.5rem; text-align: center; display: flex; flex-direction: column; justify-content: space-between; }
.pill-label { font-size: 0.65rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 0.2rem; }
.pill-value { font-size: 0.95rem; color: var(--text-main); font-weight: bold; }
.pill-multiplier { color: var(--text-muted); font-weight: normal; font-size: 0.8rem; margin: 0 0.1rem; }
.pill-actions { margin-top: 0.5rem; display: flex; justify-content: space-between; border-top: 1px solid var(--border); padding-top: 0.4rem; }
.pill-action-link { font-size: 0.75rem; font-weight: 500; text-decoration: none; }
.pill-action-link.edit { color: var(--primary); }
.pill-action-link.del { color: var(--danger); }
.no-history { text-align: center; color: var(--text-muted); }