/* ============================================================
   GYM APP — Mobile-First CSS
   ============================================================ */

/* ---- Reset & Base ---------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg:          #0f0f1a;
    --bg2:         #16162a;
    --card:        #1e1e35;
    --card2:       #252540;
    --border:      #2d2d50;
    --primary:     #7c3aed;
    --primary-lit: #9d5cf5;
    --primary-dim: #3d1f7a;
    --accent:      #06b6d4;
    --success:     #10b981;
    --danger:      #ef4444;
    --warn:        #f59e0b;
    --text:        #e2e8f0;
    --text2:       #94a3b8;
    --text3:       #64748b;
    --radius:      14px;
    --radius-sm:   8px;
    --shadow:      0 4px 24px rgba(0,0,0,.45);
    --nav-h:       64px;
    --top-h:       56px;
    --font:        'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary-lit); text-decoration: none; }

/* ---- Auth Layout ----------------------------------------- */
.auth-page { display: flex; align-items: flex-start; justify-content: center; padding: 24px 16px 40px; min-height: 100vh; }
.auth-card { width: 100%; max-width: 430px; }

.auth-logo { text-align: center; padding: 32px 0 28px; }
.auth-logo-icon { font-size: 56px; display: block; margin-bottom: 8px; }
.auth-title { font-size: 2rem; font-weight: 800; background: linear-gradient(135deg, var(--primary-lit), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.auth-subtitle { color: var(--text2); margin-top: 4px; font-size: 1rem; }

.auth-form { display: flex; flex-direction: column; gap: 16px; }
.auth-footer { text-align: center; margin-top: 24px; color: var(--text2); font-size: 0.95rem; }
.auth-footer a { color: var(--primary-lit); font-weight: 600; }

/* ---- App Layout ------------------------------------------ */
.app-page { padding-top: var(--top-h); padding-bottom: calc(var(--nav-h) + 8px); }

/* Top Bar */
.topbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    height: var(--top-h);
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 16px;
    backdrop-filter: blur(12px);
}
.app-logo { font-size: 1.25rem; font-weight: 800; color: var(--primary-lit); }
.topbar-avatar {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.9rem; color: #fff;
}

/* Main Content */
.main-content { padding: 16px 16px 8px; max-width: 600px; margin: 0 auto; }

/* Bottom Nav */
.bottom-nav {
    position: fixed; bottom: 0; left: 0; right: 0; z-index: 100;
    height: var(--nav-h);
    background: var(--bg2);
    border-top: 1px solid var(--border);
    display: flex;
}
.nav-item {
    flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 2px; color: var(--text3); font-size: 0.7rem; font-weight: 500;
    transition: color .2s;
    padding: 6px 0;
    -webkit-tap-highlight-color: transparent;
}
.nav-item.active { color: var(--primary-lit); }
.nav-icon { font-size: 1.35rem; line-height: 1; }
.nav-label { line-height: 1; }

/* ---- Components ------------------------------------------ */

/* Page Header */
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.page-title { font-size: 1.4rem; font-weight: 800; }
.page-subtitle { color: var(--text2); font-size: 0.9rem; margin-top: 2px; }

/* Card */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 12px;
}
.card-header-row {
    display: flex; align-items: center; justify-content: space-between;
    cursor: pointer; font-weight: 600; font-size: 1rem; color: var(--text);
    user-select: none; -webkit-tap-highlight-color: transparent;
}
.card-section-label { font-size: 0.8rem; font-weight: 700; color: var(--text3); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 10px; }
.collapsible-body { padding-top: 14px; }
.chevron { transition: transform .25s; font-size: 1.1rem; color: var(--text3); }
.chevron.open { transform: rotate(180deg); }

/* Section Title */
.section-title {
    font-size: 0.85rem; font-weight: 700; color: var(--text3); text-transform: uppercase;
    letter-spacing: .06em; margin: 20px 0 8px; display: flex; align-items: center; gap: 8px;
}

/* Badges */
.badge {
    background: var(--primary-dim); color: var(--primary-lit);
    font-size: 0.75rem; font-weight: 700; padding: 2px 8px; border-radius: 20px;
}
.badge-today { background: var(--accent); color: #fff; font-size: 0.7rem; padding: 1px 7px; border-radius: 20px; font-weight: 700; }

/* Alerts */
.alert { padding: 12px 14px; border-radius: var(--radius-sm); font-size: 0.95rem; margin-bottom: 14px; font-weight: 500; }
.alert-error   { background: rgba(239,68,68,.15); border: 1px solid rgba(239,68,68,.4); color: #fca5a5; }
.alert-success { background: rgba(16,185,129,.15); border: 1px solid rgba(16,185,129,.4); color: #6ee7b7; }

/* Info Banner */
.info-banner {
    background: rgba(124,58,237,.15); border: 1px solid rgba(124,58,237,.3);
    border-radius: var(--radius-sm); padding: 12px 14px; margin-bottom: 12px;
    font-size: 0.95rem; color: var(--text);
}
.info-banner-muted { background: var(--card); border-color: var(--border); color: var(--text2); }
.info-banner strong { color: var(--primary-lit); }

/* ---- Forms ----------------------------------------------- */
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-label { font-size: 0.88rem; font-weight: 600; color: var(--text2); }
.form-hint  { font-size: 0.78rem; color: var(--text3); }
.form-row   { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.form-row.three { grid-template-columns: 1fr 1fr 1fr; }

.form-input {
    background: var(--card2); border: 1.5px solid var(--border);
    border-radius: var(--radius-sm); padding: 12px 14px;
    color: var(--text); font-family: var(--font); font-size: 1rem;
    transition: border-color .2s; -webkit-appearance: none; appearance: none;
    width: 100%;
}
.form-input:focus { outline: none; border-color: var(--primary); }
.form-input::placeholder { color: var(--text3); }
.form-input-sm { padding: 9px 12px; font-size: 0.9rem; }

/* Level Cards */
.level-cards { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
.level-card {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 4px; padding: 10px 6px;
    background: var(--card2); border: 2px solid var(--border);
    border-radius: var(--radius-sm); cursor: pointer;
    transition: border-color .2s, background .2s;
    -webkit-tap-highlight-color: transparent;
}
.level-card input[type=radio] { display: none; }
.level-card:has(input:checked) { border-color: var(--primary); background: var(--primary-dim); }
.level-icon { font-size: 1.4rem; line-height: 1; }
.level-name { font-size: 0.7rem; font-weight: 600; color: var(--text2); text-align: center; }

/* ---- Buttons --------------------------------------------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 12px 20px; border-radius: var(--radius-sm);
    font-family: var(--font); font-size: 1rem; font-weight: 700;
    border: none; cursor: pointer; transition: opacity .2s, transform .1s;
    -webkit-tap-highlight-color: transparent;
    text-decoration: none;
}
.btn:active { transform: scale(.97); }
.btn-full { width: 100%; }
.btn-sm { padding: 8px 14px; font-size: 0.85rem; }

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-lit); }
.btn-ghost { background: transparent; border: 1.5px solid var(--border); color: var(--text2); }
.btn-ghost:hover { border-color: var(--primary); color: var(--text); }
.btn-danger { background: var(--danger); color: #fff; }

/* ---- Calendar -------------------------------------------- */
.calendar-nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.cal-month-title { font-weight: 700; font-size: 1.05rem; }
.cal-nav-btn { font-size: 1.5rem; color: var(--primary-lit); padding: 4px 10px; cursor: pointer; -webkit-tap-highlight-color: transparent; }

.calendar-grid {
    display: grid; grid-template-columns: repeat(7, 1fr);
    gap: 4px; text-align: center;
}
.cal-dow { font-size: 0.72rem; font-weight: 700; color: var(--text3); padding: 4px 0; text-transform: uppercase; }
.cal-day {
    aspect-ratio: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
    border-radius: 50%; font-size: 0.88rem; font-weight: 500; color: var(--text2);
    cursor: pointer; position: relative; transition: background .15s;
    -webkit-tap-highlight-color: transparent;
    text-decoration: none;
}
.cal-blank { pointer-events: none; }
.cal-day:hover { background: var(--card2); }
.cal-today { color: var(--accent); font-weight: 800; }
.cal-today::after { content: ''; position: absolute; bottom: 3px; width: 4px; height: 4px; border-radius: 50%; background: var(--accent); }
.cal-selected { background: var(--primary) !important; color: #fff !important; font-weight: 800; }
.cal-has-plan { color: var(--text); }
.cal-done { background: rgba(16,185,129,.2); color: var(--success); }
.cal-done.cal-selected { background: var(--primary) !important; color: #fff !important; }

.cal-dot { width: 4px; height: 4px; border-radius: 50%; position: absolute; bottom: 2px; }
.plan-dot { background: var(--primary-lit); }
.done-dot { background: var(--success); }

.cal-legend { display: flex; gap: 14px; margin-top: 12px; font-size: 0.78rem; color: var(--text3); padding-top: 8px; border-top: 1px solid var(--border); }
.legend-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 4px; }

/* Plan Row */
.plan-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.plan-dow { width: 36px; font-size: 0.85rem; font-weight: 700; color: var(--text2); flex-shrink: 0; }
.mt-2 { margin-top: 8px; }

/* ---- Exercise Cards -------------------------------------- */
.exercise-card-link { text-decoration: none; display: block; }
.exercise-card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 12px;
    display: flex; align-items: center; gap: 12px;
    margin-bottom: 10px;
    transition: border-color .2s, background .2s;
    -webkit-tap-highlight-color: transparent;
}
.exercise-card-link:active .exercise-card { background: var(--card2); border-color: var(--primary); }
.exercise-done { opacity: .6; }

.exercise-gif-wrap {
    width: 72px; height: 72px; flex-shrink: 0;
    border-radius: var(--radius-sm); overflow: hidden;
    background: var(--card2); display: flex; align-items: center; justify-content: center;
}
.exercise-gif { width: 100%; height: 100%; object-fit: cover; }
.exercise-gif-placeholder { font-size: 1.8rem; color: var(--text3); }

.exercise-info { flex: 1; min-width: 0; }
.exercise-name { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 3px; }
.exercise-region-tag { font-size: 0.74rem; background: var(--card2); color: var(--text3); border-radius: 6px; padding: 2px 8px; display: inline-block; margin-bottom: 4px; }
.exercise-meta { font-size: 0.82rem; color: var(--text2); display: flex; gap: 10px; flex-wrap: wrap; margin-top: 4px; }
.arrow-icon { color: var(--text3); font-size: 1.4rem; }

/* Difficulty */
.difficulty-badge {
    display: inline-block; font-size: 0.72rem; font-weight: 700;
    padding: 2px 8px; border-radius: 20px; margin-bottom: 3px;
}
.diff-beginner     { background: rgba(16,185,129,.2);  color: var(--success); }
.diff-intermediate { background: rgba(245,158,11,.2); color: var(--warn); }
.diff-advanced     { background: rgba(239,68,68,.2);   color: var(--danger); }
.diff-custom       { background: rgba(6,182,212,.2);   color: var(--accent); }

/* Done Toggle */
.done-toggle { flex-shrink: 0; }
.btn-done { background: none; border: none; font-size: 1.6rem; cursor: pointer; padding: 4px; -webkit-tap-highlight-color: transparent; }
.btn-done-active { filter: drop-shadow(0 0 6px var(--success)); }

/* ---- Body Map -------------------------------------------- */
.bodymap-wrap { display: flex; flex-direction: column; align-items: center; gap: 16px; margin-bottom: 8px; }
.body-svg {
    width: 100%; max-width: 240px; height: auto;
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 12px;
    display: block;
}
.body-region { transition: fill .2s, opacity .2s; cursor: pointer; }
.body-region:hover { fill: #5b21b6 !important; opacity: 0.8 !important; }

.region-chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; width: 100%; }
.region-chip {
    padding: 7px 14px; font-size: 0.85rem; font-weight: 600;
    background: var(--card); border: 1.5px solid var(--border);
    border-radius: 20px; color: var(--text2); cursor: pointer;
    transition: all .2s; -webkit-tap-highlight-color: transparent;
}
.region-chip:hover { border-color: var(--primary); color: var(--text); }
.region-chip-active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ---- Exercise Detail ------------------------------------- */
.back-nav { margin-bottom: 12px; }
.back-btn { color: var(--text2); font-size: 0.9rem; font-weight: 600; }

.exercise-detail-header { text-align: center; margin-bottom: 16px; }
.detail-gif-wrap {
    width: 200px; height: 200px; margin: 0 auto 16px;
    border-radius: var(--radius); overflow: hidden;
    background: var(--card); display: flex; align-items: center; justify-content: center;
    border: 1px solid var(--border);
}
.detail-gif-placeholder { font-size: 4rem; }
.detail-gif { width: 100%; height: 100%; object-fit: cover; }
.detail-name { font-size: 1.5rem; font-weight: 800; margin-bottom: 8px; }
.detail-tags { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.equipment-tag { font-size: 0.74rem; background: var(--card2); color: var(--text3); border-radius: 6px; padding: 2px 8px; }
.detail-description { font-size: 1rem; color: var(--text2); line-height: 1.7; }

/* Stats Row */
.stats-row { display: flex; align-items: center; justify-content: space-around; text-align: center; }
.stat-item { flex: 1; padding: 8px; }
.stat-value { font-size: 1.6rem; font-weight: 800; color: var(--text); }
.stat-label { font-size: 0.75rem; color: var(--text3); font-weight: 600; text-transform: uppercase; margin-top: 2px; }
.stat-divider { width: 1px; height: 40px; background: var(--border); }

/* History Table */
.history-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.history-table th { color: var(--text3); font-weight: 700; font-size: 0.75rem; text-transform: uppercase; padding: 4px 6px; text-align: left; border-bottom: 1px solid var(--border); }
.history-table td { padding: 8px 6px; border-bottom: 1px solid var(--border); color: var(--text2); }
.history-table tr:last-child td { border-bottom: none; }
.row-done td { color: var(--text3); }

/* ---- Profile -------------------------------------------- */
.profile-hero { text-align: center; padding-bottom: 20px; }
.profile-avatar {
    width: 72px; height: 72px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex; align-items: center; justify-content: center;
    font-size: 1.8rem; font-weight: 800; color: #fff;
    margin: 0 auto 12px;
}
.profile-name    { font-size: 1.3rem; font-weight: 800; }
.profile-username { font-size: 0.9rem; color: var(--text2); margin-top: 2px; }
.profile-level-badge {
    display: inline-block; margin-top: 8px;
    font-size: 0.85rem; font-weight: 700;
    padding: 4px 14px; border-radius: 20px;
}
.level-beginner     { background: rgba(16,185,129,.2); color: var(--success); }
.level-intermediate { background: rgba(245,158,11,.2); color: var(--warn); }
.level-advanced     { background: rgba(239,68,68,.2);  color: var(--danger); }

/* ---- Progress / Log ------------------------------------- */
.progress-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.progress-label { width: 100px; font-size: 0.88rem; color: var(--text2); flex-shrink: 0; }
.progress-bar-wrap { flex: 1; height: 8px; background: var(--card2); border-radius: 4px; overflow: hidden; }
.progress-bar { height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 4px; transition: width .6s ease; }
.progress-count { width: 28px; font-size: 0.78rem; color: var(--text3); text-align: right; flex-shrink: 0; }

.log-day-card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 12px 14px;
    display: flex; align-items: center; gap: 12px;
    margin-bottom: 8px; text-decoration: none;
    transition: border-color .2s;
    -webkit-tap-highlight-color: transparent;
}
.log-day-card:active { border-color: var(--primary); }
.log-day-date { font-size: 1rem; font-weight: 800; color: var(--text); min-width: 44px; line-height: 1.1; }
.log-day-weekday { display: block; font-size: 0.72rem; color: var(--text3); font-weight: 600; }
.log-day-info { flex: 1; }
.log-day-regions { font-size: 0.85rem; color: var(--text2); margin-bottom: 2px; }
.log-day-count { font-size: 0.75rem; color: var(--text3); }
.log-day-status { font-size: 1.3rem; }

/* ---- Search -------------------------------------------- */
.filter-form { margin-bottom: 16px; }
.search-bar {
    display: flex; align-items: center; gap: 8px;
    background: var(--card); border: 1.5px solid var(--border);
    border-radius: var(--radius-sm); padding: 0 12px; margin-bottom: 10px;
    transition: border-color .2s;
}
.search-bar:focus-within { border-color: var(--primary); }
.search-icon { font-size: 1rem; color: var(--text3); }
.search-input { flex: 1; background: none; border: none; outline: none; color: var(--text); font-size: 1rem; padding: 11px 0; font-family: var(--font); }
.search-input::placeholder { color: var(--text3); }
.search-clear { color: var(--text3); font-size: 1rem; }
.filter-row { display: flex; gap: 8px; align-items: center; }
.filter-row .form-input-sm { flex: 1; }

/* ---- Exercise Add Form --------------------------------- */
.exercise-add-form { display: flex; flex-direction: column; gap: 12px; }

/* ---- Toast --------------------------------------------- */
.toast {
    position: fixed; bottom: calc(var(--nav-h) + 16px); left: 50%; transform: translateX(-50%);
    background: var(--success); color: #fff; font-weight: 700;
    padding: 10px 20px; border-radius: 20px; font-size: 0.95rem;
    z-index: 1000; transition: opacity .4s;
    box-shadow: 0 4px 16px rgba(0,0,0,.5);
    white-space: nowrap;
}
.toast-hide { opacity: 0; pointer-events: none; }

/* ---- Empty State --------------------------------------- */
.empty-state {
    text-align: center; padding: 40px 20px;
    color: var(--text2); font-size: 1rem;
}
.empty-icon { font-size: 3rem; margin-bottom: 12px; }
.empty-hint { color: var(--text3); font-size: 0.88rem; margin-top: 6px; }

/* ---- Utility ------------------------------------------- */
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 16px; }

/* ---- Scrollbar ----------------------------------------- */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* ---- Large screens (tablet+) --------------------------- */
@media (min-width: 600px) {
    .main-content { padding: 20px 20px 8px; }
    .auth-page { padding-top: 48px; }
    .detail-gif-wrap { width: 260px; height: 260px; }
    .exercise-gif-wrap { width: 90px; height: 90px; }
}