/* ================================
   File: contact.css
   Description: Modern Contact page with interactive social cards
   Author: GitHub Copilot
   Date: November 10, 2025
   ================================ */

/*------------------------------------*\
  #VARIABLES
\*------------------------------------*/
:root {
    /* Colors */
    --contact-primary: #1E40AF;
    --contact-secondary: #60A5FA;
    --contact-accent: #3B82F6;
    --contact-text: #111827;
    --contact-text-light: #6B7280;
    --contact-background: #F9FAFB;
    --contact-white: #FFFFFF;
    
    /* Social Brand Colors */
    --facebook: #1877F2;
    --linkedin: #0A66C2;
    --youtube: #FF0000;
    --tiktok: #000000;
    --telegram: #26A5E4;
    --zalo: #0068FF;
    --n8n: #EA4B71;
    --instagram: #E4405F;
    
    /* Typography */
    --contact-font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --contact-title-size: clamp(2.5rem, 5vw, 4rem);
    --contact-heading-size: clamp(1.75rem, 3vw, 2.5rem);
    
    /* Spacing */
    --contact-section-spacing: clamp(4rem, 10vw, 8rem);
    
    /* Effects */
    --contact-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --contact-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --contact-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --contact-radius: 0.5rem;
    --contact-radius-lg: 1rem;
    --contact-radius-xl: 1.5rem;
    --contact-radius-full: 9999px;
}

/*------------------------------------*\
  #GENERAL STYLES
\*------------------------------------*/
.contact-page-modern {
    font-family: var(--contact-font-sans);
    color: var(--contact-text);
    background-color: var(--contact-background);
    line-height: 1.6;
}

.contact-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.contact-page-modern section {
    padding: var(--contact-section-spacing) 0;
    position: relative;
    overflow: hidden;
}

/* Badge */
.contact-badge {
    display: inline-block;
    padding: 0.35em 1em;
    background: var(--contact-primary);
    color: #FFFFFF;
    border-radius: var(--contact-radius-full);
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.text-highlight {
    background: linear-gradient(135deg, var(--contact-primary), var(--contact-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/*------------------------------------*\
  #HERO SECTION
\*------------------------------------*/
.contact-hero-section {
    min-height: 60vh;
    display: flex;
    align-items: center;
    background-color: var(--contact-white);
}

.contact-hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-float {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--contact-primary), var(--contact-secondary));
    opacity: 0.1;
    filter: blur(50px);
    animation: float 25s infinite alternate ease-in-out;
}

.hero-float-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    left: 5%;
}

.hero-float-2 {
    width: 250px;
    height: 250px;
    bottom: 10%;
    right: 10%;
    animation-delay: 5s;
}

.hero-float-3 {
    width: 200px;
    height: 200px;
    top: 50%;
    right: 20%;
    animation-delay: 10s;
}

@keyframes float {
    0% { transform: translate(0, 0); }
    50% { transform: translate(30px, 20px); }
    100% { transform: translate(-20px, 40px); }
}

.contact-hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-hero-title {
    font-size: var(--contact-title-size);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--contact-text);
}

.contact-hero-description {
    font-size: 1.25rem;
    color: var(--contact-text-light);
    line-height: 1.7;
    max-width: 700px;
    margin: 0 auto;
}

/*------------------------------------*\
  #CONTACT METHODS
\*------------------------------------*/
.contact-methods-section {
    background-color: #F8FAFC;
}

.contact-methods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.contact-method-card {
    background: var(--contact-white);
    padding: 2.5rem 2rem;
    border-radius: var(--contact-radius-xl);
    box-shadow: var(--contact-shadow);
    text-align: center;
    transition: var(--contact-transition);
    text-decoration: none;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.contact-method-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--contact-primary), var(--contact-secondary));
    transform: scaleX(0);
    transition: transform var(--contact-transition);
}

.contact-method-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--contact-shadow-lg);
    border-color: var(--contact-primary);
}

.contact-method-card:hover::before {
    transform: scaleX(1);
}

.method-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--contact-primary), var(--contact-secondary));
    border-radius: var(--contact-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--contact-transition);
}

.contact-method-card:hover .method-icon {
    transform: scale(1.1) rotate(5deg);
}

.method-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--contact-text);
    margin-bottom: 0.5rem;
}

.method-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--contact-primary);
    margin-bottom: 0.5rem;
}

.method-label {
    font-size: 0.875rem;
    color: var(--contact-text-light);
}

/*------------------------------------*\
  #SOCIAL MEDIA SECTION
\*------------------------------------*/
.contact-social-section {
    background-color: var(--contact-white);
}

.social-header {
    text-align: center;
    margin-bottom: 4rem;
}

.social-title {
    font-size: var(--contact-heading-size);
    font-weight: 900;
    color: var(--contact-text);
    margin-bottom: 1rem;
}

.social-description {
    font-size: 1.125rem;
    color: var(--contact-text-light);
    max-width: 700px;
    margin: 0 auto;
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.social-card {
    position: relative;
    background: var(--contact-white);
    border-radius: var(--contact-radius-lg);
    padding: 2rem;
    text-decoration: none;
    overflow: hidden;
    border: 2px solid rgba(0, 0, 0, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.social-card-inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.social-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--contact-radius);
    transition: var(--contact-transition);
}

.social-info {
    flex: 1;
}

.social-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.social-handle {
    font-size: 0.875rem;
    opacity: 0.8;
}

.social-card-glow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity var(--contact-transition);
    pointer-events: none;
    z-index: 1;
}

/* Facebook */
.social-card.facebook {
    background: linear-gradient(135deg, rgba(24, 119, 242, 0.05), rgba(24, 119, 242, 0.1));
    border-color: rgba(24, 119, 242, 0.2);
}

.social-card.facebook .social-icon {
    background: var(--facebook);
    color: white;
}

.social-card.facebook .social-name,
.social-card.facebook .social-handle {
    color: var(--facebook);
}

.social-card.facebook:hover {
    background: linear-gradient(135deg, rgba(24, 119, 242, 0.1), rgba(24, 119, 242, 0.15));
    border-color: var(--facebook);
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 30px rgba(24, 119, 242, 0.3);
}

/* LinkedIn */
.social-card.linkedin {
    background: linear-gradient(135deg, rgba(10, 102, 194, 0.05), rgba(10, 102, 194, 0.1));
    border-color: rgba(10, 102, 194, 0.2);
}

.social-card.linkedin .social-icon {
    background: var(--linkedin);
    color: white;
}

.social-card.linkedin .social-name,
.social-card.linkedin .social-handle {
    color: var(--linkedin);
}

.social-card.linkedin:hover {
    background: linear-gradient(135deg, rgba(10, 102, 194, 0.1), rgba(10, 102, 194, 0.15));
    border-color: var(--linkedin);
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 30px rgba(10, 102, 194, 0.3);
}

/* YouTube */
.social-card.youtube {
    background: linear-gradient(135deg, rgba(255, 0, 0, 0.05), rgba(255, 0, 0, 0.1));
    border-color: rgba(255, 0, 0, 0.2);
}

.social-card.youtube .social-icon {
    background: var(--youtube);
    color: white;
}

.social-card.youtube .social-name,
.social-card.youtube .social-handle {
    color: var(--youtube);
}

.social-card.youtube:hover {
    background: linear-gradient(135deg, rgba(255, 0, 0, 0.1), rgba(255, 0, 0, 0.15));
    border-color: var(--youtube);
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 30px rgba(255, 0, 0, 0.3);
}

/* TikTok */
.social-card.tiktok {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.05), rgba(0, 0, 0, 0.1));
    border-color: rgba(0, 0, 0, 0.2);
}

.social-card.tiktok .social-icon {
    background: var(--tiktok);
    color: white;
}

.social-card.tiktok .social-name,
.social-card.tiktok .social-handle {
    color: var(--tiktok);
}

.social-card.tiktok:hover {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.15));
    border-color: var(--tiktok);
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* Telegram */
.social-card.telegram {
    background: linear-gradient(135deg, rgba(38, 165, 228, 0.05), rgba(38, 165, 228, 0.1));
    border-color: rgba(38, 165, 228, 0.2);
}

.social-card.telegram .social-icon {
    background: var(--telegram);
    color: white;
}

.social-card.telegram .social-name,
.social-card.telegram .social-handle {
    color: var(--telegram);
}

.social-card.telegram:hover {
    background: linear-gradient(135deg, rgba(38, 165, 228, 0.1), rgba(38, 165, 228, 0.15));
    border-color: var(--telegram);
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 30px rgba(38, 165, 228, 0.3);
}

/* Zalo */
.social-card.zalo {
    background: linear-gradient(135deg, rgba(0, 104, 255, 0.05), rgba(0, 104, 255, 0.1));
    border-color: rgba(0, 104, 255, 0.2);
}

.social-card.zalo .social-icon {
    background: var(--zalo);
    color: white;
}

.social-card.zalo .social-name,
.social-card.zalo .social-handle {
    color: var(--zalo);
}

.social-card.zalo:hover {
    background: linear-gradient(135deg, rgba(0, 104, 255, 0.1), rgba(0, 104, 255, 0.15));
    border-color: var(--zalo);
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 30px rgba(0, 104, 255, 0.3);
}

/* n8n Creator Card */
.social-card.n8n {
    background: linear-gradient(135deg, rgba(234, 75, 113, 0.05), rgba(234, 75, 113, 0.1));
    border-color: rgba(234, 75, 113, 0.2);
}

.social-card.n8n .social-icon {
    background: var(--n8n);
    color: white;
}

.social-card.n8n .social-name,
.social-card.n8n .social-handle {
    color: var(--n8n);
}

.social-card.n8n:hover {
    background: linear-gradient(135deg, rgba(234, 75, 113, 0.1), rgba(234, 75, 113, 0.15));
    border-color: var(--n8n);
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 30px rgba(234, 75, 113, 0.3);
}

/* Instagram Card */
.social-card.instagram {
    background: linear-gradient(135deg, rgba(228, 64, 95, 0.05), rgba(228, 64, 95, 0.1));
    border-color: rgba(228, 64, 95, 0.2);
}

.social-card.instagram .social-icon {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: white;
}

.social-card.instagram .social-name,
.social-card.instagram .social-handle {
    color: var(--instagram);
}

.social-card.instagram:hover {
    background: linear-gradient(135deg, rgba(228, 64, 95, 0.1), rgba(228, 64, 95, 0.15));
    border-color: var(--instagram);
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 30px rgba(228, 64, 95, 0.3);
}

/*------------------------------------*\
  #CTA SECTION
\*------------------------------------*/
.contact-cta-section {
    background: linear-gradient(135deg, var(--contact-primary), var(--contact-accent));
    color: var(--contact-white);
}

.contact-cta-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.cta-title {
    font-size: var(--contact-heading-size);
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--contact-white);
}

.cta-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    padding: 1rem 2rem;
    border-radius: var(--contact-radius);
    font-weight: 600;
    text-decoration: none;
    transition: var(--contact-transition);
    font-size: 1rem;
}

.cta-button.primary {
    background: var(--contact-white);
    color: var(--contact-primary);
}

.cta-button.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.cta-button.secondary {
    background: transparent;
    color: var(--contact-white);
    border: 2px solid var(--contact-white);
}

.cta-button.secondary:hover {
    background: var(--contact-white);
    color: var(--contact-primary);
}

/*------------------------------------*\
  #RESPONSIVE
\*------------------------------------*/
@media (max-width: 768px) {
    .contact-hero-section {
        min-height: 50vh;
        padding: 5rem 0;
    }
    
    .contact-hero-title {
        font-size: 2.5rem;
    }
    
    .contact-hero-description {
        font-size: 1.125rem;
    }
    
    .contact-methods-grid,
    .social-grid {
        grid-template-columns: 1fr;
    }
    
    .social-card-inner {
        flex-direction: column;
        text-align: center;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .cta-button {
        width: 100%;
    }
    
    .contact-form-wrapper {
        padding: 2rem 1.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .submit-button {
        width: 100%;
    }
}

/*------------------------------------*\
  #CONTACT FORM SECTION
\*------------------------------------*/
.contact-form-section {
    padding: var(--contact-section-spacing) 0;
    background: var(--contact-background);
}

.form-header {
    text-align: center;
    margin-bottom: 3rem;
}

.form-title {
    font-size: var(--contact-heading-size);
    font-weight: 900;
    color: var(--contact-text);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.form-description {
    font-size: 1.125rem;
    color: var(--contact-text-light);
    max-width: 600px;
    margin: 0 auto;
}

.contact-form-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: var(--contact-white);
    padding: 3rem;
    border-radius: var(--contact-radius-xl);
    box-shadow: var(--contact-shadow-lg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--contact-text);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.form-group .required {
    color: #EF4444;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    font-family: var(--contact-font-sans);
    color: var(--contact-text);
    background: var(--contact-background);
    border: 2px solid transparent;
    border-radius: var(--contact-radius);
    transition: var(--contact-transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--contact-primary);
    background: var(--contact-white);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.captcha-group {
    background: var(--contact-background);
    padding: 1.5rem;
    border-radius: var(--contact-radius);
}

.captcha-question {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--contact-primary);
    color: var(--contact-white);
    border-radius: var(--contact-radius);
    font-weight: 700;
    margin-left: 0.5rem;
}

.submit-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--contact-white);
    background: linear-gradient(135deg, var(--contact-primary) 0%, var(--contact-accent) 100%);
    border: none;
    border-radius: var(--contact-radius-lg);
    cursor: pointer;
    transition: var(--contact-transition);
    box-shadow: var(--contact-shadow);
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--contact-shadow-lg);
}

.submit-button:active {
    transform: translateY(0);
}

.submit-button .button-icon {
    transition: transform var(--contact-transition);
}

.submit-button:hover .button-icon {
    transform: translateX(4px);
}

.form-message {
    padding: 1rem;
    border-radius: var(--contact-radius);
    font-weight: 600;
    text-align: center;
    display: none;
}

.form-message.success {
    display: block;
    background: #ECFDF5;
    color: #065F46;
    border: 2px solid #10B981;
}

.form-message.error {
    display: block;
    background: #FEF2F2;
    color: #991B1B;
    border: 2px solid #EF4444;
}

/*------------------------------------*\
  #ACCESSIBILITY
\*------------------------------------*/
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}