/* 
   CAPIX FIT - AI Training App
   Design System
*/

:root {
    --primary: #00f2ff;
    --primary-alt: #0066ff;
    --accent: #ff4d00;
    --font-main: 'Outfit', sans-serif;
    --font-app: 'Bebas Neue', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Dark Theme */
    --bg-app: #050505;
    --bg-nav: #0f0f12;
    --bg-card: #16161a;
    --text-main: #ffffff;
    --text-dim: #8a8a92;
    --border: rgba(255, 255, 255, 0.05);
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] {
    --bg-app: #f4f6f8;
    --bg-nav: #ffffff;
    --bg-card: #ffffff;
    --text-main: #1a1a1c;
    --text-dim: #6a6a72;
    --border: rgba(0, 0, 0, 0.05);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

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

body {
    background-color: var(--bg-app);
    color: var(--text-main);
    font-family: var(--font-main);
    overflow: hidden; /* App feel */
    transition: background-color 0.4s ease;
}

#app {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar Navigation */
.app-nav {
    width: 280px;
    background: var(--bg-nav);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 2.5rem;
    z-index: 100;
    transition: var(--transition);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-family: var(--font-app);
    font-size: 1.8rem;
    letter-spacing: 0.1em;
    margin-bottom: 4rem;
}
.nav-logo i { color: var(--primary); width: 32px; height: 32px; }
.highlight { color: var(--primary); }

.nav-menu { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; flex: 1; }
.nav-menu li {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    padding: 1.2rem;
    border-radius: 15px;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-dim);
    transition: var(--transition);
}
.nav-menu li i { width: 20px; }
.nav-menu li:hover { background: rgba(0, 242, 255, 0.05); color: var(--text-main); }
.nav-menu li.active { background: var(--primary); color: #000; box-shadow: 0 10px 20px rgba(0, 242, 255, 0.2); }

.nav-footer { margin-top: auto; display: flex; flex-direction: column; gap: 1.5rem; }

.theme-toggle-btn {
    width: 45px; height: 45px; background: var(--bg-app); border: 1px solid var(--border);
    border-radius: 12px; display: flex; align-items: center; justify-content: center; cursor: pointer;
    color: var(--text-main);
}
[data-theme="light"] .dark-icon, [data-theme="dark"] .light-icon { display: block; }
[data-theme="light"] .light-icon, [data-theme="dark"] .dark-icon { display: none; }

.lang-switcher { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.lang-btn {
    background: var(--bg-app); border: 1px solid var(--border); padding: 0.4rem 0.8rem;
    border-radius: 8px; font-size: 0.7rem; font-weight: 800; color: var(--text-dim); cursor: pointer;
}
.lang-btn.active { border-color: var(--primary); color: var(--primary); }

/* Main Content Area */
.app-content {
    flex: 1;
    height: 100%;
    overflow-y: auto;
    padding: 3rem;
    position: relative;
}

/* Views Logic */
.app-view { display: none; opacity: 0; transform: translateY(20px); }
.app-view.active { display: block; animation: viewIn 0.5s forwards ease-out; }
@keyframes viewIn { to { opacity: 1; transform: translateY(0); } }

/* Onboarding Survey */
.survey-container { height: 70vh; display: flex; align-items: center; justify-content: center; text-align: center; }
.survey-step { display: none; width: 100%; max-width: 600px; }
.survey-step.active { display: block; }
.survey-step h1 { font-size: 3rem; margin-bottom: 3rem; font-family: var(--font-app); letter-spacing: 0.05em; }

.options-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.opt-btn {
    background: var(--bg-card); border: 1px solid var(--border); padding: 2.5rem;
    border-radius: 24px; cursor: pointer; display: flex; flex-direction: column; align-items: center;
    gap: 1.5rem; transition: var(--transition);
}
.opt-btn i { width: 40px; height: 40px; color: var(--primary); }
.opt-btn span { font-weight: 700; font-size: 1.1rem; color: var(--text-main); }
.opt-btn:hover { border-color: var(--primary); transform: translateY(-5px); box-shadow: var(--shadow); }

/* AI Loader */
.ai-loader { display: flex; flex-direction: column; align-items: center; gap: 2rem; }
.pulse-ring { 
    width: 100px; height: 100px; background: var(--primary); border-radius: 50%;
    animation: ringPulse 2s infinite; box-shadow: 0 0 0 rgba(0, 242, 255, 0.4);
}
@keyframes ringPulse { 
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 242, 255, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 40px rgba(0, 242, 255, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 242, 255, 0); }
}

/* Dashboard */
.view-header { margin-bottom: 4rem; }
.view-header h1 { font-family: var(--font-app); font-size: 3.5rem; letter-spacing: 0.05em; }
.view-header p { color: var(--text-dim); font-size: 1.1rem; }

.dashboard-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 2.5rem; }
.dash-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 30px; padding: 2.5rem; box-shadow: var(--shadow); }

.main-stats { display: flex; flex-direction: column; gap: 2.5rem; }
.stat-item { display: flex; flex-direction: column; gap: 0.8rem; }
.stat-item .label { font-size: 0.8rem; font-weight: 800; color: var(--text-dim); text-transform: uppercase; }
.stat-item .value { font-family: var(--font-app); font-size: 2.5rem; letter-spacing: 0.05em; }
.stat-item .unit { font-size: 1rem; color: var(--text-dim); }

.progress-bar { width: 100%; height: 6px; background: var(--bg-app); border-radius: 3px; overflow: hidden; }
.progress-bar .fill { height: 100%; background: linear-gradient(to right, var(--primary), var(--primary-alt)); }

.workout-today { grid-column: span 1; }
.workout-today h3 { margin-bottom: 2rem; font-family: var(--font-app); }
.workout-info { display: flex; flex-direction: column; gap: 1.5rem; }
.workout-info img { width: 100%; height: 200px; object-fit: cover; border-radius: 20px; }
.workout-info .text h4 { font-size: 1.5rem; margin-bottom: 0.4rem; }
.workout-info .text p { color: var(--text-dim); }

.btn { padding: 1rem 2rem; border-radius: 12px; font-weight: 700; border: none; cursor: pointer; transition: var(--transition); font-family: var(--font-main); }
.btn-primary { background: var(--primary); color: #000; }
.btn-primary:hover { transform: scale(1.05); box-shadow: 0 10px 20px rgba(0, 242, 255, 0.3); }

.schedule h3 { margin-bottom: 2rem; font-family: var(--font-app); }
.schedule-list { list-style: none; display: flex; flex-direction: column; gap: 1.2rem; }
.schedule-list li { display: flex; align-items: center; gap: 1.5rem; padding: 1rem; background: var(--bg-app); border-radius: 15px; }
.schedule-list li .day { background: var(--border); padding: 0.4rem 0.8rem; border-radius: 8px; font-size: 0.7rem; font-weight: 800; color: var(--primary); }

/* Workouts Library */
.workouts-filter { display: flex; gap: 1rem; margin-bottom: 3rem; overflow-x: auto; padding-bottom: 1rem; }
.filter-btn { padding: 0.8rem 1.5rem; border-radius: 50px; background: var(--bg-card); border: 1px solid var(--border); color: var(--text-dim); cursor: pointer; font-weight: 600; white-space: nowrap; }
.filter-btn.active { background: var(--primary); border-color: var(--primary); color: #000; }

.workouts-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 2rem; }
.workout-card { 
    height: 350px; background: linear-gradient(to top, rgba(0,0,0,0.8), transparent), url('workout.png'); 
    background-size: cover; background-position: center; border-radius: 24px; padding: 2rem;
    display: flex; flex-direction: column; justify-content: flex-end; border: 1px solid var(--border);
    transition: var(--transition); position: relative;
}
.workout-card:hover { transform: translateY(-10px); border-color: var(--primary); }
.workout-card .badge { position: absolute; top: 2rem; right: 2rem; background: var(--accent); color: white; padding: 0.4rem 0.8rem; border-radius: 5px; font-size: 0.7rem; font-weight: 800; }
.workout-card h4 { font-family: var(--font-app); font-size: 1.8rem; color: white; }
.workout-card p { color: rgba(255,255,255,0.7); font-size: 0.9rem; }

/* Preloader */
#preloader {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: #000; z-index: 10000; display: flex; justify-content: center; align-items: center;
}
.loader-circle { width: 50px; height: 50px; border: 3px solid var(--primary); border-top-color: transparent; border-radius: 50%; animation: spin 1s infinite linear; }
.loader-text { margin-top: 1.5rem; font-family: var(--font-app); letter-spacing: 0.3em; color: white; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Mobile Adaptability */
@media (max-width: 992px) {
    #app { flex-direction: column; }
    .app-nav { 
        width: 100%; height: auto; flex-direction: row; padding: 1rem 1.5rem; 
        position: fixed; bottom: 0; left: 0; border-right: none; border-top: 1px solid var(--border);
    }
    .nav-logo, .nav-footer { display: none; }
    .nav-menu { flex-direction: row; justify-content: space-around; width: 100%; }
    .nav-menu li { padding: 1rem; border-radius: 12px; }
    .nav-menu li span { display: none; }
    .app-content { padding: 2rem; padding-bottom: 100px; }
    .dashboard-grid { grid-template-columns: 1fr; }
}