/* =================================================================
   DEMO PAGE - Design System Compliant
   Uses tokens from styles.css
   Grid: Strict 4px base
   ================================================================= */

/* ===== Demo Hero Section ===== */
.demo-hero {
    padding: calc(64px + var(--space-64)) 0 var(--space-48);
    background: var(--color-accent-subtle);
    position: relative;
    overflow: hidden;
}

.demo-hero__content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.demo-hero__title {
    font-size: var(--text-40);
    font-weight: var(--font-bold);
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--color-fg-primary);
    margin: var(--space-16) 0 var(--space-16);
}

.demo-hero__description {
    font-size: var(--text-18);
    line-height: 1.6;
    color: var(--color-fg-secondary);
    margin-bottom: var(--space-32);
}

.demo-hero__actions {
    display: flex;
    gap: var(--space-12);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Demo Cards Section ===== */
.demo-cards {
    padding: var(--space-64) 0 var(--space-96);
    background: var(--color-bg-base);
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-24);
}

/* ===== Demo Card ===== */
.demo-card {
    position: relative;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--color-bg-base);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-base) var(--ease);
}

.demo-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-color-hover);
}

/* ===== Demo Card Image Section ===== */
.demo-card__image-full {
    position: relative;
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.demo-card__image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(15, 23, 42, 0.2) 0%,
        rgba(15, 23, 42, 0.7) 60%,
        rgba(15, 23, 42, 0.9) 100%
    );
    z-index: 1;
}

.demo-card__image-content {
    position: relative;
    z-index: 2;
    padding: var(--space-20);
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.demo-card__image-title {
    font-size: var(--text-18);
    font-weight: var(--font-bold);
    letter-spacing: -0.01em;
    line-height: 1.3;
    color: #ffffff;
    margin: 0;
}

.demo-card__image-badge {
    display: inline-block;
    width: fit-content;
    padding: var(--space-4) var(--space-10);
    font-size: var(--text-11);
    font-weight: var(--font-semibold);
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: rgba(0, 191, 166, 0.15);
    border: 1px solid rgba(0, 191, 166, 0.3);
    border-radius: var(--radius-sm);
    backdrop-filter: blur(4px);
}

/* ===== Demo Card Body ===== */
.demo-card__body {
    padding: var(--space-20);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.demo-card__title {
    font-size: var(--text-16);
    font-weight: var(--font-bold);
    line-height: 1.3;
    color: var(--color-fg-primary);
    margin: 0 0 var(--space-6) 0;
}

.demo-card__subtitle {
    font-size: var(--text-13);
    font-weight: var(--font-medium);
    color: var(--color-accent);
    margin: 0 0 var(--space-12) 0;
}

.demo-card__description {
    font-size: var(--text-14);
    line-height: 1.6;
    color: var(--color-fg-secondary);
    margin: 0 0 var(--space-16) 0;
    flex: 1;
}

/* ===== Demo Card Unlock Button ===== */
.demo-card__unlock-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    width: 100%;
    padding: var(--space-12) var(--space-20);
    font-size: var(--text-14);
    font-weight: var(--font-medium);
    font-family: var(--font-sans);
    text-decoration: none;
    color: var(--color-accent);
    background: var(--color-accent-subtle);
    border: 1px dashed var(--color-accent);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease);
    margin-top: auto;
}

.demo-card__unlock-btn:hover {
    background: var(--color-accent);
    color: #ffffff;
    border-style: solid;
    transform: translateY(-1px);
    box-shadow: var(--shadow-accent);
}

/* ===== Demo CTA Section ===== */
.demo-cta {
    padding: var(--space-64) 0;
    background: var(--color-bg-subtle);
}

.demo-cta__content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.demo-cta__title {
    font-size: var(--text-32);
    font-weight: var(--font-bold);
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: var(--color-fg-primary);
    margin-bottom: var(--space-20);
}

.demo-cta__title .text-gradient {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.demo-cta__description {
    font-size: var(--text-16);
    line-height: 1.7;
    color: var(--color-fg-secondary);
    margin-bottom: var(--space-32);
}

.demo-cta__actions {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-24);
}

.demo-cta__guarantee {
    display: inline-flex;
    align-items: center;
    gap: var(--space-8);
    padding: var(--space-10) var(--space-16);
    font-size: var(--text-13);
    color: var(--color-fg-muted);
    background: var(--color-bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
}

.demo-cta__guarantee svg {
    width: 18px;
    height: 18px;
    color: var(--color-accent);
}

/* ===== Gallery/Video Section ===== */
.demo-gallery {
    padding: var(--space-96) 0;
    background: var(--color-bg-subtle);
}

.demo-gallery__header {
    text-align: center;
    margin-bottom: var(--space-48);
}

.demo-gallery__title {
    font-size: var(--text-32);
    font-weight: var(--font-bold);
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: var(--color-fg-primary);
    margin-bottom: var(--space-16);
}

.demo-gallery__description {
    font-size: var(--text-16);
    line-height: 1.6;
    color: var(--color-fg-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.demo-gallery__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-24);
}

.demo-video {
    background: var(--color-bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-20);
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-base) var(--ease);
}

.demo-video:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-color-hover);
}

.demo-video__thumbnail {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    background: var(--color-bg-muted);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--space-16);
}

.demo-video__thumbnail img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.demo-video__play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-accent);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease);
}

.demo-video__play:hover {
    background: var(--color-accent-hover);
    transform: translate(-50%, -50%) scale(1.1);
}

.demo-video__play svg {
    width: 24px;
    height: 24px;
    margin-left: 3px;
}

.demo-video__title {
    font-size: var(--text-16);
    font-weight: var(--font-semibold);
    line-height: 1.3;
    color: var(--color-fg-primary);
    margin-bottom: var(--space-8);
}

.demo-video__description {
    font-size: var(--text-14);
    line-height: 1.6;
    color: var(--color-fg-secondary);
}

/* ===== Demo Form Components (Legacy Support) ===== */
.demo-card__content {
    padding: var(--space-24);
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
    height: 100%;
}

.demo-card__header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-16);
}

.demo-card__icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.demo-card__icon svg {
    width: 26px;
    height: 26px;
}

.demo-card__header-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    min-width: 0;
}

.demo-card__highlight-text {
    font-size: var(--text-12);
    font-weight: var(--font-semibold);
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: var(--color-accent-subtle);
    padding: var(--space-6) var(--space-14);
    border-radius: var(--radius-md);
    border-left: 1px solid var(--color-accent);
    background: var(--color-bg-base);
    display: inline-block;
    width: fit-content;
}

.demo-card__features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.demo-card__feature {
    display: flex;
    align-items: flex-start;
    gap: var(--space-10);
    font-size: var(--text-13);
    line-height: 1.6;
    color: var(--color-fg-secondary);
}

.demo-card__feature svg {
    width: 16px;
    height: 16px;
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.demo-card__cta {
    margin-top: auto;
    padding-top: var(--space-16);
}

.demo-card__button {
    width: 100%;
    padding: var(--space-12) var(--space-20);
    font-size: var(--text-14);
    font-weight: var(--font-medium);
    font-family: var(--font-sans);
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-accent);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
}

.demo-card__button:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 191, 166, 0.25);
}

.demo-card__button--secondary {
    background: var(--color-bg-base);
    color: var(--color-fg-primary);
    border: 1px solid var(--border-color);
    box-shadow: none;
}

.demo-card__button--secondary:hover {
    background: var(--color-bg-subtle);
    border-color: var(--border-color-hover);
    transform: none;
}

/* ===== Demo Card Badge ===== */
.demo-card__badge {
    position: absolute;
    top: var(--space-16);
    right: var(--space-16);
    padding: var(--space-6) var(--space-12);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-secondary) 100%);
    color: white;
    font-size: var(--text-11);
    font-weight: var(--font-bold);
    letter-spacing: 0.02em;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-accent);
    z-index: 5;
}

/* ===== Demo Form (Overlay) ===== */
.demo-card__form {
    position: absolute;
    inset: 0;
    background: var(--color-bg-base);
    padding: var(--space-24);
    display: none;
    flex-direction: column;
    z-index: 15;
    overflow-y: auto;
    border-radius: var(--radius-lg);
}

.demo-card__form.show {
    display: flex;
    animation: fadeInDemo var(--duration-base) var(--ease);
}

@keyframes fadeInDemo {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.demo-card__form-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-20);
}

.demo-card__form-title {
    font-size: var(--text-18);
    font-weight: var(--font-bold);
    line-height: 1.3;
    color: var(--color-fg-primary);
}

.demo-card__form-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-subtle);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--color-fg-muted);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease);
}

.demo-card__form-close:hover {
    background: var(--color-bg-muted);
    color: var(--color-fg-primary);
    border-color: var(--border-color-hover);
}

.demo-card__form-description {
    font-size: var(--text-14);
    line-height: 1.6;
    color: var(--color-fg-secondary);
    margin-bottom: var(--space-20);
}

.demo-card__form-fields {
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.form-field__label {
    font-size: var(--text-13);
    font-weight: var(--font-medium);
    color: var(--color-fg-primary);
}

.form-field__input {
    padding: var(--space-12) var(--space-16);
    font-size: var(--text-14);
    font-family: var(--font-sans);
    line-height: 1.5;
    color: var(--color-fg-primary);
    background: var(--color-bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--duration-fast) var(--ease);
}

.form-field__input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 191, 166, 0.1);
}

.form-field__input::placeholder {
    color: var(--color-fg-faint);
}

.form-field__textarea {
    min-height: 100px;
    resize: vertical;
}

.demo-card__form-submit {
    margin-top: var(--space-20);
}

.demo-card__form-success {
    display: none;
    text-align: center;
    padding: var(--space-32);
}

.demo-card__form-success.show {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-16);
    animation: fadeInDemo var(--duration-base) var(--ease);
}

.demo-card__form-success-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #d1fae5;
    color: var(--color-success);
    border-radius: var(--radius-full);
}

.demo-card__form-success-icon svg {
    width: 32px;
    height: 32px;
}

.demo-card__form-success-title {
    font-size: var(--text-24);
    font-weight: var(--font-bold);
    color: var(--color-fg-primary);
}

.demo-card__form-success-text {
    font-size: var(--text-14);
    line-height: 1.6;
    color: var(--color-fg-secondary);
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .demo-grid {
        grid-template-columns: 1fr;
        max-width: 560px;
        margin-left: auto;
        margin-right: auto;
    }
}

@media (max-width: 768px) {
    .demo-hero {
        padding: calc(64px + var(--space-48)) 0 var(--space-40);
    }
    
    .demo-hero__title {
        font-size: var(--text-32);
    }
    
    .demo-hero__description {
        font-size: var(--text-16);
    }
    
    .demo-cards {
        padding: var(--space-48) 0 var(--space-64);
    }
    
    .demo-card__image-full {
        height: 180px;
    }
    
    .demo-card__image-content {
        padding: var(--space-16);
    }
    
    .demo-card__body {
        padding: var(--space-16);
    }
    
    .demo-cta {
        padding: var(--space-64) 0;
    }
    
    .demo-cta__title {
        font-size: var(--text-28);
    }
    
    .demo-gallery__grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .demo-hero {
        padding: calc(64px + var(--space-24)) 0 var(--space-24);
    }
    
    .demo-hero__title {
        font-size: 1.25rem;
        line-height: 1.2;
    }
    
    .demo-hero__description {
        font-size: 0.75rem;
    }
    
    .demo-hero__actions {
        flex-direction: column;
    }
    
    .demo-hero__actions .btn {
        width: 100%;
        font-size: 0.75rem;
    }
    
    .demo-cards {
        padding: var(--space-24) 0 var(--space-32);
    }
    
    .demo-cards__header h2 {
        font-size: 1.125rem;
    }
    
    .demo-cards__header p {
        font-size: 0.6875rem;
    }
    
    .demo-grid {
        gap: var(--space-12);
    }
    
    .demo-card__image-full {
        height: 140px;
    }
    
    .demo-card__image-title {
        font-size: 0.8125rem;
    }
    
    .demo-card__image-content {
        padding: var(--space-10);
    }
    
    .demo-card__body {
        padding: var(--space-12);
    }
    
    .demo-card__title {
        font-size: 0.75rem;
    }
    
    .demo-card__subtitle {
        font-size: 0.625rem;
    }
    
    .demo-card__description {
        font-size: 0.6875rem;
        line-height: 1.4;
    }
    
    .demo-card__unlock-btn {
        padding: var(--space-8) var(--space-12);
        font-size: 0.6875rem;
    }
    
    .demo-cta {
        padding: var(--space-32) 0;
    }
    
    .demo-cta__title {
        font-size: 1.125rem;
    }
    
    .demo-cta__description {
        font-size: 0.75rem;
    }
    
    .demo-cta .btn {
        font-size: 0.75rem;
    }
    
    .demo-video {
        padding: var(--space-12);
    }
}