/* ========== CSS Reset & Variables ========== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #2196F3;
    --primary-dark: #1976D2;
    --secondary: #FFC107;
    --accent: #4CAF50;
    --red: #E53935;
    --dark: #37474F;
    --dark-light: #546E7A;
    --gray: #78909C;
    --gray-light: #B0BEC5;
    --white: #FFFFFF;
    --bg-light: #FAFAFA;
    --gradient-1: linear-gradient(135deg, #2196F3 0%, #4CAF50 100%);
    --gradient-2: linear-gradient(135deg, #FFC107 0%, #2196F3 100%);
    --gradient-3: linear-gradient(180deg, rgba(33, 150, 243, 0.05) 0%, rgba(76, 175, 80, 0.05) 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 40px rgba(33, 150, 243, 0.2);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--white);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========== Utility Classes ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray);
    max-width: 600px;
}

.page-hero {
    padding: 140px 0 60px;
    text-align: center;
    background: linear-gradient(180deg, var(--white) 0%, var(--bg-light) 100%);
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(33, 150, 243, 0.06) 0%, transparent 70%);
    animation: float 15s ease-in-out infinite;
}

.page-hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 1rem;
}

.page-hero h1 .highlight {
    color: var(--primary);
}

.page-hero p {
    font-size: 1.2rem;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(5deg); }
    66% { transform: translate(-20px, 20px) rotate(-5deg); }
}

/* ========== Header & Navigation ========== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

header.scrolled {
    padding: 0.75rem 0;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 100px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--dark-light);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-2);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-links a.active {
    color: var(--primary);
    font-weight: 600;
}

.nav-links a.active::after {
    width: 100%;
}

.nav-cta {
    background: var(--gradient-2);
    color: var(--white) !important;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
}

.nav-cta::after {
    display: none !important;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--dark);
    transition: all 0.3s ease;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-2);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(33, 150, 243, 0.3);
}

.btn-secondary {
    background: var(--white);
    color: var(--dark);
    border: 2px solid rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
    background: var(--bg-light);
    border-color: var(--primary);
    color: var(--primary);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ========== Cards ========== */
.card {
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 20px;
    padding: 2rem;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-2);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(33, 150, 243, 0.3);
    box-shadow: var(--shadow-lg);
}

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

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-2);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--dark);
}

.card p {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ========== Form Styles ========== */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--dark);
}

.form-group input,
.form-group textarea,
.form-group select {
    background: var(--bg-light);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    padding: 1rem;
    color: var(--dark);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23333' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
    padding-right: 2.5rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

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

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

.form-status {
    padding: 1rem;
    border-radius: 12px;
    text-align: center;
    font-weight: 500;
    display: none;
    margin-bottom: 1rem;
}

.form-status.success {
    display: block;
    background: rgba(76, 175, 80, 0.15);
    border: 1px solid rgba(76, 175, 80, 0.3);
    color: #4CAF50;
}

.form-status.error {
    display: block;
    background: rgba(229, 57, 53, 0.15);
    border: 1px solid rgba(229, 57, 53, 0.3);
    color: #E53935;
}

.form-status.loading {
    display: block;
    background: rgba(33, 150, 243, 0.15);
    border: 1px solid rgba(33, 150, 243, 0.3);
    color: var(--primary);
}

/* ========== Footer ========== */
footer {
    padding: 60px 0 30px;
    background: var(--primary);
    border-top: none;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    margin-top: 1rem;
    line-height: 1.7;
}

.footer-brand img {
    height: 45px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer-col h4 {
    color: var(--white);
    font-weight: 700;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.5rem;
}

.footer-col a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-col a:hover {
    color: var(--white);
}

.footer-social {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
}

/* ========== AI Chatbot Widget ========== */
.chatbot-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 60px;
    height: 60px;
    background: var(--gradient-2);
    border: none;
    border-radius: 50%;
    box-shadow: 0 8px 32px rgba(33, 150, 243, 0.4);
    cursor: pointer;
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all 0.3s ease;
    animation: fabPulse 3s ease-in-out infinite;
}

.chatbot-fab:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 40px rgba(33, 150, 243, 0.5);
}

@keyframes fabPulse {
    0%, 100% { box-shadow: 0 8px 32px rgba(33, 150, 243, 0.4); }
    50% { box-shadow: 0 8px 32px rgba(33, 150, 243, 0.6), 0 0 0 12px rgba(33, 150, 243, 0.1); }
}

.chatbot-panel {
    position: fixed;
    bottom: 100px;
    right: 24px;
    width: 380px;
    max-height: 520px;
    background: var(--white);
    border-radius: 20px;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.2);
    z-index: 9999;
    display: none;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.08);
    animation: chatSlideUp 0.3s ease;
}

.chatbot-panel.open {
    display: flex;
}

@keyframes chatSlideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.chatbot-header {
    background: var(--gradient-2);
    color: var(--white);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chatbot-header-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.chatbot-header-info .avatar {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.chatbot-header h4 {
    font-size: 0.95rem;
    font-weight: 700;
}

.chatbot-header p {
    font-size: 0.75rem;
    opacity: 0.85;
}

.chatbot-close {
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 4px;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.chatbot-close:hover {
    opacity: 1;
}

.chatbot-messages {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    max-height: 320px;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.chat-msg {
    max-width: 85%;
    padding: 0.75rem 1rem;
    border-radius: 16px;
    font-size: 0.9rem;
    line-height: 1.5;
    animation: msgFadeIn 0.3s ease;
}

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

.chat-msg.bot {
    background: var(--bg-light);
    color: var(--dark);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.chat-msg.user {
    background: var(--primary);
    color: var(--white);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.chat-msg.typing {
    background: var(--bg-light);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.typing-dots {
    display: flex;
    gap: 4px;
    padding: 4px 0;
}

.typing-dots span {
    width: 8px;
    height: 8px;
    background: var(--gray);
    border-radius: 50%;
    animation: typingBounce 1.4s ease-in-out infinite;
}

.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-6px); }
}

.chatbot-suggestions {
    padding: 0.5rem 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.chatbot-suggestions button {
    background: rgba(33, 150, 243, 0.08);
    border: 1px solid rgba(33, 150, 243, 0.2);
    color: var(--primary);
    padding: 0.4rem 0.75rem;
    border-radius: 20px;
    font-size: 0.78rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.chatbot-suggestions button:hover {
    background: rgba(33, 150, 243, 0.15);
    border-color: var(--primary);
}

.chatbot-input {
    display: flex;
    padding: 0.75rem;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    gap: 0.5rem;
}

.chatbot-input input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 50px;
    font-family: inherit;
    font-size: 0.9rem;
    color: var(--dark);
    background: var(--bg-light);
    transition: border-color 0.3s;
}

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

.chatbot-input button {
    width: 40px;
    height: 40px;
    background: var(--gradient-2);
    border: none;
    border-radius: 50%;
    color: var(--white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: transform 0.2s;
}

.chatbot-input button:hover {
    transform: scale(1.05);
}

/* ========== Mobile Responsive ========== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        transform: translateY(-150%);
        transition: transform 0.3s ease;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        box-shadow: var(--shadow-md);
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .nav-links a {
        color: var(--dark);
        font-size: 1.1rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .footer-social {
        justify-content: center;
    }

    .logo img {
        height: 80px;
    }

    .chatbot-panel {
        right: 8px;
        left: 8px;
        width: auto;
        bottom: 90px;
    }

    .page-hero {
        padding: 120px 0 40px;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 2rem;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .logo img {
        height: 60px;
    }
}