/* ===================================
   RepSay Website Styles
   Colors from Flutter App:
   - Volt (Accent): #DBF756
   - Background: #121212
   - Surface: #1E1E1E
   - Text Primary: #FFFFFF
   - Text Secondary: #9E9E9E
=================================== */

:root {
    --color-volt: #dbf756;
    --color-volt-dark: #b4cc46;
    --color-background: #121212;
    --color-surface: #1e1e1e;
    --color-surface-light: #2a2a2a;
    --color-text-primary: #ffffff;
    --color-text-secondary: #9e9e9e;
    --color-border: rgba(255, 255, 255, 0.1);

    --font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Text Gradient */
.text-gradient {
    background: linear-gradient(
        135deg,
        var(--color-volt),
        var(--color-volt-dark)
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===================================
   Navigation
=================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(18, 18, 18, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 900;
    font-size: 1.5rem;
}

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

.logo-text {
    color: var(--color-text-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: "";
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-volt);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--color-text-primary);
}

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

.nav-cta {
    background: var(--color-volt);
    color: var(--color-background) !important;
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: 600;
}

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

.nav-cta:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(219, 247, 86, 0.4);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition);
}

/* ===================================
   Hero Section
=================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(
        circle,
        rgba(219, 247, 86, 0.15) 0%,
        transparent 70%
    );
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 0.875rem;
    color: var(--color-volt);
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    border-radius: 12px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--color-text-primary);
    color: var(--color-background);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.btn-icon {
    width: 28px;
    height: 28px;
}

.btn-text {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.btn-label {
    font-size: 0.7rem;
    opacity: 0.7;
}

.btn-title {
    font-size: 1rem;
}

/* Phone Mockup */
.hero-visual {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 280px;
    height: 580px;
    background: linear-gradient(145deg, #2a2a2a, #1a1a1a);
    border-radius: 40px;
    padding: 12px;
    box-shadow:
        0 50px 100px rgba(0, 0, 0, 0.5),
        inset 0 1px 1px rgba(255, 255, 255, 0.1);
    position: relative;
}

.phone-mockup::before {
    content: "";
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 24px;
    background: #000;
    border-radius: 20px;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--color-background);
    border-radius: 32px;
    overflow: hidden;
}

.app-demo {
    padding: 60px 20px 20px;
    height: 100%;
}

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

.demo-month {
    background: var(--color-surface);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.demo-add {
    background: var(--color-surface);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    color: var(--color-volt);
    font-size: 1.25rem;
}

.demo-greeting {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-bottom: 4px;
}

.demo-title {
    font-size: 1.25rem;
    font-weight: 900;
    margin-bottom: 16px;
}

.demo-card {
    background: var(--color-surface);
    border-radius: 16px;
    padding: 16px;
}

.demo-card-header {
    display: flex;
    justify-content: space-between;
    font-weight: 600;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
}

.demo-date {
    color: var(--color-volt);
    font-size: 0.75rem;
}

.demo-exercise {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    margin-bottom: 8px;
}

.demo-weight {
    color: var(--color-volt);
    font-weight: 600;
}

.demo-mic {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

.mic-button {
    width: 60px;
    height: 60px;
    background: var(--color-volt);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 10px 30px rgba(219, 247, 86, 0.3);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 10px 30px rgba(219, 247, 86, 0.3);
    }
    50% {
        box-shadow: 0 10px 50px rgba(219, 247, 86, 0.5);
    }
}

/* ===================================
   About Section
=================================== */
.about {
    padding: 100px 0;
    background: var(--color-surface);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-badge {
    display: inline-block;
    background: rgba(219, 247, 86, 0.1);
    color: var(--color-volt);
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 900;
    margin-bottom: 16px;
}

.section-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

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

.feature-card {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 32px;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-volt);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* ===================================
   Privacy Section
=================================== */
.privacy {
    padding: 100px 0;
}

.privacy-content {
    max-width: 800px;
    margin: 0 auto;
}

.privacy-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 48px;
}

.privacy-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 32px 0 12px;
    color: var(--color-volt);
}

.privacy-card h3:first-child {
    margin-top: 0;
}

.privacy-card p {
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.privacy-card ul {
    color: var(--color-text-secondary);
    margin-left: 24px;
    list-style: disc;
}

.privacy-card li {
    margin-bottom: 8px;
}

.privacy-card strong {
    color: var(--color-text-primary);
}

/* ===================================
   Contact Section
=================================== */
.contact {
    padding: 100px 0;
    background: var(--color-surface);
}

.contact-form-container {
    max-width: 600px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-card {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 24px;
    text-align: center;
    transition: var(--transition);
}

.contact-card:hover {
    border-color: var(--color-volt);
}

.contact-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.contact-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-card p {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.contact-form-wrapper {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 40px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    font-size: 0.875rem;
}

.form-group input,
.form-group textarea {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 16px;
    color: var(--color-text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-volt);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-secondary);
}

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

.btn-submit {
    background: var(--color-volt);
    color: var(--color-background);
    padding: 16px 32px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.btn-submit:hover:not(:disabled) {
    transform: scale(1.02);
    box-shadow: 0 10px 30px rgba(219, 247, 86, 0.3);
}

.btn-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-text-loading,
.btn-text-success {
    display: none;
}

.btn-submit.loading .btn-text-default {
    display: none;
}
.btn-submit.loading .btn-text-loading {
    display: inline;
}

.btn-submit.success .btn-text-default {
    display: none;
}
.btn-submit.success .btn-text-loading {
    display: none;
}
.btn-submit.success .btn-text-success {
    display: inline;
}
.btn-submit.success {
    background: #4caf50;
}

/* ===================================
   Success Modal
=================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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

.modal-content {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    padding: 48px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    transform: scale(0.8) translateY(20px);
    transition: var(--transition);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-icon {
    width: 80px;
    height: 80px;
    background: var(--color-volt);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 2.5rem;
    color: var(--color-background);
    font-weight: bold;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 900;
    margin-bottom: 12px;
    color: var(--color-text-primary);
}

.modal-message {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 32px;
}

.btn-modal-ok {
    background: var(--color-volt);
    color: var(--color-background);
    padding: 14px 48px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    display: block;
    margin: 0 auto;
}

.btn-modal-ok:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px rgba(219, 247, 86, 0.3);
}

/* ===================================
   Footer
=================================== */
.footer {
    padding: 60px 0;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 900;
    margin-bottom: 8px;
}

.footer-tagline {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 24px;
}

.footer-links a {
    color: var(--color-text-secondary);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--color-volt);
}

.footer-copyright {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* ===================================
   Animations
=================================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   Responsive Design
=================================== */
@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin: 0 auto 40px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

    .phone-mockup {
        width: 240px;
        height: 500px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .contact-info {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .contact-card {
        flex: 1 1 150px;
        max-width: 200px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-background);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .privacy-card {
        padding: 24px;
    }

    .contact-form-wrapper {
        padding: 24px;
    }
}