/* =====================================================
   SCREW SORT PUZZLE - UI CSS
   Buttons, Modals, Menus, HUD, Forms
   ===================================================== */

/* ===== HEADER / HUD ===== */
.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    background: var(--color-bg-glass);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.header-center {
    text-align: center;
}

.level-indicator {
    background: var(--color-accent-primary);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--text-sm);
}

/* ===== STATS ===== */
.stat {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--color-bg-card);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
}

.stat-icon {
    width: 20px;
    height: 20px;
}

.stat--lives .stat-icon {
    color: #ff4757;
}

.stat--coins .stat-icon {
    color: #ffd700;
}

.stat--hints .stat-icon {
    color: #7bed9f;
}

.lives-display {
    display: flex;
    gap: 2px;
}

.life-heart {
    width: 16px;
    height: 16px;
    font-size: 14px;
}

.life-heart--empty {
    opacity: 0.3;
    filter: grayscale(1);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    text-transform: uppercase;
}

.btn:active {
    transform: scale(0.95);
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-accent-primary), #ff6b8a);
    color: white;
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
}

.btn--secondary {
    background: var(--color-bg-glass);
    color: var(--color-text-primary);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn--success {
    background: linear-gradient(135deg, var(--color-accent-success), #22c55e);
    color: white;
}

.btn--ad {
    background: linear-gradient(135deg, #ffd700, #ffb700);
    color: #1a1a1a;
}

.btn--icon {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: 50%;
    background: var(--color-bg-glass);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn--sm {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--text-sm);
}

.btn--lg {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--text-lg);
}

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay--active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    max-width: 400px;
    width: 90%;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal-overlay--active .modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-body {
    padding: var(--space-lg);
}

.modal-footer {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-footer .btn {
    flex: 1;
}

/* ===== TOGGLE ===== */
.toggle {
    position: relative;
    width: 50px;
    height: 28px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: var(--transition-fast);
}

.toggle input:checked+.toggle-slider {
    background: var(--color-accent-success);
}

.toggle input:checked+.toggle-slider::before {
    transform: translateX(22px);
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: var(--space-md);
    background: var(--color-bg-card);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent-primary);
}

.form-error {
    color: var(--color-accent-error);
    font-size: var(--text-sm);
    margin-top: var(--space-xs);
}

/* ===== AUTH ===== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    background: linear-gradient(180deg, var(--color-bg-primary), var(--color-bg-secondary));
}

.auth-card {
    background: var(--color-bg-glass);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    width: 100%;
    max-width: 400px;
}

.auth-logo {
    width: 120px;
    margin: 0 auto var(--space-lg);
}

.auth-title {
    text-align: center;
    margin-bottom: var(--space-xl);
}

/* ===== TOAST ===== */
.toast-container {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    animation: slideInRight var(--transition-normal);
    border-left: 4px solid var(--color-accent-primary);
}

.toast--success {
    border-left-color: var(--color-accent-success);
}

.toast--error {
    border-left-color: var(--color-accent-error);
}

/* ===== ADS ===== */
.ad-banner {
    width: 100%;
    min-height: 50px;
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: var(--space-md) 0;
}

.ad-interstitial {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: var(--z-overlay);
}

/* ===== LOADING ===== */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-bg-tertiary);
    border-top-color: var(--color-accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ===== MENU ===== */
.menu-screen {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    text-align: center;
}

.menu-logo {
    max-width: 280px;
    margin-bottom: var(--space-xl);
    animation: bounce 2s infinite;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    width: 100%;
    max-width: 300px;
}