/* =========================================
   LOADER.CSS — Анимация загрузки приложения
   Химические формулы с эффектом печати
   ========================================= */

/* === Основной контейнер === */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f0f23 100%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 99999;
    opacity: 1;
    transition: opacity 0.5s ease-out;
    overflow: hidden;
}

#loading-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

#loading-screen.hidden {
    display: none;
}

/* === Фоновые частицы === */
.loader-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.loader-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(33, 150, 243, 0.3);
    border-radius: 50%;
    animation: loader-float 15s infinite ease-in-out;
}

@keyframes loader-float {
    0%, 100% { 
        transform: translateY(100vh) rotate(0deg); 
        opacity: 0; 
    }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { 
        transform: translateY(-100vh) rotate(720deg); 
        opacity: 0; 
    }
}

/* === Контейнер формулы === */
.formula-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 10;
}

/* === Орбиты вокруг формулы === */
.loader-orbits {
    position: absolute;
    width: 300px;
    height: 300px;
    pointer-events: none;
}

.orbit-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid rgba(33, 150, 243, 0.15);
    border-radius: 50%;
    animation: orbit-spin 10s linear infinite;
}

.orbit-ring-1 { width: 200px; height: 200px; }
.orbit-ring-2 { width: 260px; height: 260px; animation-duration: 15s; animation-direction: reverse; }
.orbit-ring-3 { width: 320px; height: 320px; animation-duration: 20s; }

.orbit-dot {
    position: absolute;
    width: 6px;
    height: 6px;
    background: #00d4ff;
    border-radius: 50%;
    top: -3px;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 10px #00d4ff;
}

@keyframes orbit-spin {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* === Бокс с формулой === */
.formula-box {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(33, 150, 243, 0.2);
    border-radius: 16px;
    padding: 30px 50px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 
        0 0 40px rgba(33, 150, 243, 0.1),
        inset 0 0 30px rgba(33, 150, 243, 0.05);
    animation: glow-pulse 3s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% { 
        box-shadow: 
            0 0 40px rgba(33, 150, 243, 0.1), 
            inset 0 0 30px rgba(33, 150, 243, 0.05); 
    }
    50% { 
        box-shadow: 
            0 0 60px rgba(33, 150, 243, 0.2), 
            inset 0 0 40px rgba(33, 150, 243, 0.1); 
    }
}

/* === Текст формулы === */
.formula-text {
    font-family: 'Courier New', 'Consolas', monospace;
    font-size: 42px;
    font-weight: bold;
    color: transparent;
    background: linear-gradient(90deg, #00d4ff, #00ff88, #00d4ff);
    background-size: 200% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    animation: gradient-shift 3s linear infinite;
    letter-spacing: 2px;
    min-width: 200px;
    text-align: center;
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

/* Эффект печатной машинки */
.formula-typing {
    display: inline-block;
    overflow: hidden;
    white-space: nowrap;
    border-right: 3px solid #00d4ff;
    animation: 
        loader-typing var(--typing-duration, 1.5s) steps(var(--chars, 10), end) forwards,
        loader-blink 0.7s step-end infinite;
}

@keyframes loader-typing {
    from { max-width: 0; }
    to { max-width: 100%; }
}

@keyframes loader-blink {
    50% { border-color: transparent; }
}

/* Подпись вещества */
.formula-name {
    margin-top: 16px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 3px;
    text-transform: uppercase;
    animation: loader-fade-in 0.5s ease-out 1s forwards;
    opacity: 0;
    font-family: Arial, sans-serif;
}

@keyframes loader-fade-in {
    to { opacity: 1; }
}

/* === Прогресс-бар === */
.loader-progress-section {
    margin-top: 50px;
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 10;
}

.loader-progress-bar {
    width: 280px;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
    position: relative;
}

.loader-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #00d4ff, #00ff88, #ff00ff, #00d4ff);
    background-size: 300% 100%;
    animation: loader-progress-gradient 2s linear infinite;
    border-radius: 2px;
    transition: width 0.3s ease;
}

@keyframes loader-progress-gradient {
    0% { background-position: 0% 50%; }
    100% { background-position: 300% 50%; }
}

.loader-progress-text {
    margin-top: 12px;
    font-size: 11px;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 4px;
    text-transform: uppercase;
    font-family: Arial, sans-serif;
}

.loader-progress-percent {
    margin-top: 6px;
    font-size: 13px;
    color: rgba(0, 212, 255, 0.8);
    font-family: 'Courier New', monospace;
}

/* === Мобильная адаптация === */
@media (max-width: 600px) {
    .formula-text {
        font-size: 28px;
    }
    
    .formula-box {
        padding: 20px 30px;
    }
    
    .loader-progress-bar {
        width: 200px;
    }
    
    .loader-orbits {
        width: 200px;
        height: 200px;
    }
    
    .orbit-ring-1 { width: 140px; height: 140px; }
    .orbit-ring-2 { width: 180px; height: 180px; }
    .orbit-ring-3 { width: 220px; height: 220px; }
    
    .formula-name {
        font-size: 12px;
        letter-spacing: 2px;
    }
}

/* === Тёмная тема (уже тёмный, но на всякий случай) === */
body.dark-theme #loading-screen {
    background: linear-gradient(135deg, #0a0a15 0%, #0d1525 50%, #050510 100%);
}