:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --primary: #10b981;
    --primary-dark: #059669;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --warning: #f59e0b;
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    padding: clamp(12px, 4vw, 20px) clamp(12px, 3vw, 15px);
    max-width: 800px;
    margin: 0 auto;
    min-width: 0;
    overflow-x: hidden;
}

/* Header */
header {
    text-align: center;
    margin-bottom: clamp(20px, 5vw, 30px);
    padding-bottom: clamp(14px, 4vw, 20px);
    border-bottom: 2px solid var(--bg-card);
}

header h1 {
    color: var(--primary);
    font-size: clamp(1.35rem, 5vw, 1.75rem);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 5px;
    word-wrap: break-word;
}

header p {
    color: var(--text-muted);
    font-size: clamp(13px, 3.5vw, 14px);
}

/* Rules Banner */
.rules-banner {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(15, 23, 42, 0) 100%);
    border: 1px solid var(--primary-dark);
    border-radius: 12px;
    padding: clamp(12px, 3vw, 15px);
    margin-bottom: clamp(20px, 5vw, 30px);
    font-size: clamp(13px, 3.5vw, 14px);
}

.rules-banner h3 {
    color: var(--primary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.rules-banner ul {
    list-style: none;
}

.rules-banner li {
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
    overflow-wrap: anywhere;
}

.rules-banner li::before {
    content: '⚡';
    position: absolute;
    left: 0;
    font-size: 12px;
    top: 2px;
}

.day-intro-muted {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 15px;
    text-align: center;
    overflow-wrap: anywhere;
}

/* Day Navigation (Collapsible Groups) */
details.day-group {
    margin: clamp(14px, 4vw, 20px) 0;
    background-color: transparent;
}

summary.day-title {
    background-color: var(--primary);
    color: var(--bg-dark);
    padding: clamp(12px, 3vw, 15px) clamp(14px, 4vw, 20px);
    border-radius: 8px;
    font-size: clamp(15px, 4vw, 18px);
    font-weight: 800;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    text-transform: uppercase;
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    min-width: 0;
}

summary.day-title::-webkit-details-marker {
    display: none;
}

.title-left {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    min-width: 0;
    flex: 1;
}

.title-subtitle {
    font-size: clamp(11px, 3vw, 13px);
    opacity: 0.8;
    font-weight: 600;
    text-transform: none;
    border-left: 2px solid rgba(0, 0, 0, 0.2);
    padding-left: 10px;
}

.toggle-icon {
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

details.day-group[open] summary.day-title .toggle-icon:not(.toggle-icon--static) {
    transform: rotate(180deg);
}

.day-title.rest {
    background-color: var(--bg-card);
    color: var(--text-main);
    border: 1px dashed var(--text-muted);
}

.day-title.optional {
    background-color: rgba(56, 189, 248, 0.1);
    color: var(--accent);
    border: 2px solid var(--accent);
}

.day-title.rest .title-subtitle,
.day-title.optional .title-subtitle {
    border-left-color: rgba(255, 255, 255, 0.2);
}

.day-content-wrapper {
    padding-top: 15px;
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Exercise Cards */
.exercise-card {
    background-color: var(--bg-card);
    border-radius: 12px;
    padding: clamp(14px, 4vw, 20px);
    margin-bottom: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    border-left: 4px solid var(--text-muted);
    min-width: 0;
}

.exercise-card.heavy {
    border-left-color: var(--warning);
}

.exercise-card.warmup {
    border-left-color: var(--accent);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
    gap: 10px;
    min-width: 0;
}

.card-header > div:first-child {
    min-width: 0;
    flex: 1;
}

.exercise-name {
    font-size: clamp(16px, 4.2vw, 18px);
    font-weight: 700;
    color: var(--text-main);
    overflow-wrap: anywhere;
}

.exercise-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 12px;
}

.stat-badge {
    background-color: rgba(255, 255, 255, 0.05);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: clamp(12px, 3.2vw, 13px);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-main);
    max-width: 100%;
}

.stat-badge i {
    color: var(--primary);
    flex-shrink: 0;
}

.stat-badge.rest-badge {
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.stat-badge.rest-badge:hover {
    transform: scale(1.02);
    background-color: rgba(245, 158, 11, 0.2);
    border-color: var(--warning);
}

.stat-badge.rest-badge[data-timer='true']::after {
    content: '▶️';
    font-size: 10px;
    margin-left: 6px;
    vertical-align: middle;
    flex-shrink: 0;
}

.biomechanic-tip {
    background-color: rgba(0, 0, 0, 0.2);
    padding: 10px 15px;
    border-radius: 8px;
    font-size: clamp(12px, 3.2vw, 13px);
    color: var(--text-muted);
    display: flex;
    gap: 10px;
    align-items: flex-start;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    overflow-wrap: anywhere;
}

.biomechanic-tip i {
    color: var(--accent);
    margin-top: 3px;
    flex-shrink: 0;
}

/* Execution Guide Dropdown */
.execution-guide {
    margin-top: 15px;
    background-color: rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    overflow: hidden;
}

.execution-guide summary {
    padding: 12px 15px;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
    user-select: none;
    flex-wrap: wrap;
}

.execution-guide summary::-webkit-details-marker {
    display: none;
}

.execution-guide[open] summary {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    background-color: rgba(16, 185, 129, 0.05);
}

.execution-guide[open] summary .fa-chevron-down {
    transform: rotate(180deg);
}

.execution-guide .fa-chevron-down {
    transition: transform 0.3s ease;
    margin-left: auto;
    color: var(--text-muted);
}

.execution-content {
    padding: 15px;
    font-size: 13px;
    color: var(--text-muted);
    overflow-wrap: anywhere;
}

.execution-content ol {
    margin: 0;
    padding-left: 20px;
}

.execution-content li {
    margin-bottom: 8px;
    line-height: 1.5;
}

.execution-content li strong {
    color: var(--text-main);
}

/* Finish Line / Cardio */
.cardio-box {
    background-color: var(--bg-card);
    border: 2px dashed var(--primary);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    margin-bottom: 15px;
}

.cardio-box.recovery-muted {
    border-color: var(--text-muted);
    padding: clamp(20px, 5vw, 30px);
}

.cardio-box.recovery-muted h4 {
    color: var(--text-main);
    margin-bottom: 10px;
}

.cardio-box h4 {
    color: var(--primary);
    margin-bottom: 5px;
    font-size: clamp(16px, 4.2vw, 18px);
}

.cardio-box p {
    font-size: clamp(13px, 3.5vw, 14px);
    color: var(--text-muted);
    overflow-wrap: anywhere;
}

/* Muscle Tags & Stretching */
.muscle-tag {
    background-color: rgba(56, 189, 248, 0.15);
    color: var(--accent);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    display: inline-block;
    max-width: 100%;
    overflow-wrap: anywhere;
}

.stretch-box {
    background-color: rgba(16, 185, 129, 0.05);
    border: 1px solid var(--primary-dark);
    border-radius: 12px;
    padding: 15px 20px;
    margin-bottom: 15px;
}

.stretch-box h4 {
    color: var(--text-main);
    font-size: 16px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.stretch-box h4 i {
    color: var(--primary);
}

.stretch-box ul {
    list-style: none;
    font-size: 14px;
    color: var(--text-muted);
}

.stretch-box li {
    margin-bottom: 8px;
    display: flex;
    gap: 8px;
    align-items: flex-start;
    overflow-wrap: anywhere;
}

.stretch-box li i {
    color: var(--accent);
    margin-top: 4px;
    font-size: 12px;
    flex-shrink: 0;
}

/* Custom Alert Modal */
#custom-alert-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 16px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

#custom-alert-overlay.show {
    opacity: 1;
    pointer-events: all;
}

.custom-alert-box {
    background-color: var(--bg-card);
    border: 2px solid var(--primary);
    border-radius: 16px;
    padding: clamp(20px, 5vw, 30px);
    text-align: center;
    width: 100%;
    max-width: 320px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 20px rgba(16, 185, 129, 0.2);
    transform: translateY(20px);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#custom-alert-overlay.show .custom-alert-box {
    transform: translateY(0);
}

.custom-alert-box i {
    font-size: 40px;
    color: var(--warning);
    margin-bottom: 15px;
}

.custom-alert-box h3 {
    color: var(--text-main);
    margin-bottom: 10px;
    font-size: clamp(18px, 5vw, 22px);
    text-transform: uppercase;
}

.custom-alert-message {
    color: var(--text-muted);
    font-size: 15px;
    overflow-wrap: anywhere;
}

.custom-alert-box button {
    background-color: var(--primary);
    color: var(--bg-dark);
    border: none;
    padding: 12px 25px;
    font-size: clamp(16px, 4vw, 18px);
    font-weight: 800;
    border-radius: 8px;
    cursor: pointer;
    margin-top: 20px;
    width: 100%;
    max-width: 100%;
    text-transform: uppercase;
    touch-action: manipulation;
}

/* Set Tracker */
.set-tracker {
    display: inline-flex;
    gap: 6px;
    margin-left: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.set-dot {
    width: 16px;
    height: 16px;
    min-width: 16px;
    min-height: 16px;
    border-radius: 50%;
    border: 2px solid var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    background-color: transparent;
    flex-shrink: 0;
    touch-action: manipulation;
}

.set-dot.completed {
    background-color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
}

.exercise-card.completed-exercise {
    border-left-color: var(--primary);
    opacity: 0.6;
    background-color: rgba(16, 185, 129, 0.05);
}

.exercise-card.completed-exercise .exercise-name {
    text-decoration: line-through;
    color: var(--primary);
}

.mark-done-btn {
    background: transparent;
    border: 2px solid var(--text-muted);
    color: var(--text-muted);
    border-radius: 8px;
    width: 32px;
    height: 32px;
    min-width: 32px;
    min-height: 32px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
    touch-action: manipulation;
}

.exercise-card.completed-exercise .mark-done-btn {
    background-color: var(--primary);
    border-color: var(--primary);
    color: var(--bg-dark);
}

/* Weight tracker */
.weight-tracker {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    background-color: rgba(0, 0, 0, 0.2);
    padding: 8px 15px;
    border-radius: 8px;
    width: fit-content;
    max-width: 100%;
    flex-wrap: wrap;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.weight-tracker i {
    color: var(--accent);
    flex-shrink: 0;
}

.weight-input {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-main);
    width: 70px;
    max-width: 100%;
    min-width: 0;
    padding: 4px 8px;
    border-radius: 4px;
    text-align: center;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    font-size: 15px;
}

.weight-input:focus {
    outline: none;
    border-color: var(--primary);
    background-color: rgba(16, 185, 129, 0.1);
}

.weight-unit {
    font-size: 13px;
    color: var(--text-muted);
}

/* Reset routine */
.reset-routine-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    background-color: rgba(245, 158, 11, 0.1);
    border: 1px dashed var(--warning);
    color: var(--warning);
    padding: 12px;
    border-radius: 12px;
    font-weight: 800;
    text-transform: uppercase;
    cursor: pointer;
    margin-bottom: 20px;
    transition: all 0.2s;
    letter-spacing: 1px;
    font-size: clamp(12px, 3.2vw, 14px);
    text-align: center;
    flex-wrap: wrap;
    touch-action: manipulation;
}

.reset-routine-btn:hover {
    background-color: var(--warning);
    color: var(--bg-dark);
}

.vibration-toggle-btn {
    margin-top: -8px;
    margin-bottom: 20px;
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px dashed var(--primary);
    color: var(--primary);
}

.vibration-toggle-btn:hover {
    background-color: var(--primary);
    color: var(--bg-dark);
}

/* Floating timer */
#floating-timer {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary);
    color: var(--bg-dark);
    padding: 12px clamp(16px, 4vw, 25px);
    border-radius: 30px;
    display: flex;
    align-items: center;
    gap: clamp(8px, 2vw, 15px);
    font-size: clamp(20px, 6vw, 28px);
    font-family: 'Inter', monospace;
    font-weight: 800;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5), 0 0 15px rgba(16, 185, 129, 0.3);
    transition: bottom 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
    max-width: calc(100vw - 24px);
    min-width: 0;
}

#floating-timer.active {
    bottom: max(16px, env(safe-area-inset-bottom, 0px));
}

#floating-timer.finished {
    background-color: var(--warning);
    animation: pulse-timer 1s infinite;
}

@keyframes pulse-timer {
    0% {
        transform: translateX(-50%) scale(1);
        box-shadow: 0 0 15px var(--warning);
    }
    50% {
        transform: translateX(-50%) scale(1.05);
        box-shadow: 0 0 30px var(--warning);
    }
    100% {
        transform: translateX(-50%) scale(1);
        box-shadow: 0 0 15px var(--warning);
    }
}

.timer-text {
    font-size: clamp(11px, 3vw, 14px);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-right: 5px;
    opacity: 0.8;
}

#close-timer {
    background: none;
    border: none;
    color: var(--bg-dark);
    font-size: 20px;
    cursor: pointer;
    opacity: 0.6;
    margin-left: 10px;
    padding: 4px;
    transition: opacity 0.2s;
    flex-shrink: 0;
    touch-action: manipulation;
}

#close-timer:hover {
    opacity: 1;
}

#timer-display {
    white-space: nowrap;
}