/**
 * LearningHub PoW System Styles
 * ==============================
 * Styling for checkpoints, navigation gating, and sequential locking.
 */

/* ==================== CHECKPOINT FORM ==================== */

.pow-checkpoint {
    margin: 2rem 0;
}

.pow-checkpoint-box {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border: 2px solid var(--accent-blue, #3b82f6);
    border-radius: 16px;
    padding: 2rem;
}

.pow-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.pow-icon {
    font-size: 1.5rem;
}

.pow-title {
    margin: 0;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary, #f1f5f9);
}

.pow-description {
    color: var(--text-secondary, #94a3b8);
    margin-bottom: 1.5rem;
}

.pow-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.pow-field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.pow-field label {
    font-weight: 600;
    color: var(--text-primary, #f1f5f9);
    font-size: 0.95rem;
}

.pow-required {
    color: #ef4444;
    margin-left: 0.25rem;
}

.pow-field input,
.pow-field textarea {
    background: rgba(0, 0, 0, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 0.875rem 1rem;
    color: var(--text-primary, #f1f5f9);
    font-family: inherit;
    font-size: 0.95rem;
    transition: all 0.2s;
}

.pow-field input:focus,
.pow-field textarea:focus {
    outline: none;
    border-color: var(--accent-cyan, #06b6d4);
    background: rgba(6, 182, 212, 0.1);
}

.pow-field textarea {
    resize: vertical;
    min-height: 100px;
}

.pow-field.has-error input,
.pow-field.has-error textarea {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.pow-counter {
    text-align: right;
    font-size: 0.8rem;
    color: var(--text-muted, #64748b);
}

.pow-counter-valid {
    color: var(--accent-green, #10b981);
}

.pow-hint {
    font-size: 0.8rem;
    color: var(--text-muted, #64748b);
}

.pow-field-error {
    font-size: 0.85rem;
    color: #ef4444;
    min-height: 1.25rem;
}

.pow-errors {
    color: #ef4444;
    font-size: 0.9rem;
}

.pow-submit {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--accent-green, #10b981), var(--accent-cyan, #06b6d4));
    color: #000;
    border: none;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 0.5rem;
}

.pow-submit:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.3);
}

.pow-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Completed State */
.pow-checkpoint-box.pow-completed {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(6, 182, 212, 0.15));
    border-color: var(--accent-green, #10b981);
}

.pow-success {
    text-align: center;
    padding: 1.5rem;
}

.pow-success-icon {
    font-size: 3.5rem;
    margin-bottom: 0.75rem;
}

.pow-success h3 {
    color: var(--accent-green, #10b981);
    margin: 0 0 0.5rem;
    font-size: 1.3rem;
}

.pow-completed-date {
    color: var(--text-muted, #64748b);
    font-size: 0.9rem;
    margin: 0;
}

/* Highlight Animation */
.pow-highlight {
    animation: pow-pulse 0.5s ease-in-out 2;
}

@keyframes pow-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
    50% { box-shadow: 0 0 0 10px rgba(59, 130, 246, 0.3); }
}

/* ==================== NAVIGATION GATING ==================== */

.nav-btn.is-locked {
    background: var(--bg-card, #1a1a2e) !important;
    border: 2px dashed rgba(239, 68, 68, 0.5) !important;
    color: var(--text-muted, #64748b) !important;
    cursor: not-allowed !important;
    opacity: 0.8;
}

.nav-btn.is-locked:hover {
    transform: none !important;
    box-shadow: none !important;
}

.nav-btn.is-locked .lock-icon {
    margin-right: 0.5rem;
}

.nav-btn.is-unlocked {
    animation: pow-unlock 0.6s ease-out;
}

.nav-btn.pow-unlocking {
    animation: pow-unlock 0.6s ease-out;
}

@keyframes pow-unlock {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 15px rgba(16, 185, 129, 0.2);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

/* ==================== TOAST NOTIFICATIONS ==================== */

.pow-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card, #1a1a2e);
    border: 1px solid var(--border, #2d2d44);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    z-index: 10001;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: all 0.3s ease;
}

.pow-toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.pow-toast-icon {
    font-size: 1.25rem;
}

.pow-toast-message {
    color: var(--text-primary, #f1f5f9);
    font-size: 0.95rem;
}

.pow-toast-warning {
    border-color: var(--accent-orange, #f59e0b);
}

.pow-toast-error {
    border-color: #ef4444;
}

.pow-toast-success {
    border-color: var(--accent-green, #10b981);
}

/* ==================== SEQUENTIAL LOCKING (MODULE PAGE) ==================== */

.lesson-card.is-locked {
    opacity: 0.6;
    filter: grayscale(30%);
    cursor: not-allowed;
}

.lesson-card.is-locked:hover {
    transform: none !important;
    border-color: var(--border, #2d2d44) !important;
}

.lesson-card.is-completed {
    border-color: var(--accent-green, #10b981) !important;
}

.lesson-card.is-completed:hover {
    border-color: var(--accent-green, #10b981) !important;
}

.lesson-card.is-next {
    border-color: var(--accent-orange, #f59e0b) !important;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), transparent) !important;
}

.lesson-status.status-complete {
    background: rgba(16, 185, 129, 0.3) !important;
    color: #10b981 !important;
}

.lesson-status.status-locked {
    background: rgba(239, 68, 68, 0.2) !important;
    color: #ef4444 !important;
}

.lesson-status.status-ready {
    background: rgba(148, 163, 184, 0.2);
    color: #94a3b8;
}

/* ==================== MOBILE RESPONSIVE ==================== */

@media (max-width: 640px) {
    .pow-checkpoint-box {
        padding: 1.5rem;
        border-radius: 12px;
    }

    .pow-title {
        font-size: 1.1rem;
    }

    .pow-field input,
    .pow-field textarea {
        padding: 0.75rem;
    }

    .pow-submit {
        padding: 0.875rem 1.5rem;
    }

    .pow-toast {
        left: 1rem;
        right: 1rem;
        transform: translateX(0) translateY(100px);
        width: auto;
    }

    .pow-toast.show {
        transform: translateX(0) translateY(0);
    }
}