* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Emerald Green Corporate Brand Colors */
    --brand-primary: #10B981;    /* Emerald 500 */
    --brand-hover: #059669;      /* Emerald 600 */
    --brand-active: #047857;     /* Emerald 700 */
    --brand-light: #D1FAE5;      /* Emerald 100 */

    /* Light Theme (Default, Facebook/X Style) */
    --bg-body: #F0F2F5;          /* FB body color */
    --bg-nav: #FFFFFF;
    --bg-card: #FFFFFF;
    
    --text-main: #050505;        /* FB dark text */
    --text-muted: #65676B;       /* FB gray text */
    
    --border-color: #CED0D4;
    --border-focus: #10B981;
    --input-bg: #FFFFFF;
    --input-border: #CCD0D5;
    
    --link-color: #10B981;
    --link-hover: #059669;
}

[data-theme="dark"] {
    /* Dark Theme (Pure Black like X true dark mode) */
    --bg-body: #000000;          /* Full Black */
    --bg-nav: #000000;
    --bg-card: #000000;
    
    --text-main: #E7E9EA;
    --text-muted: #71767B;
    
    --border-color: #2F3336;
    --border-focus: #10B981;
    --input-bg: #000000;
    --input-border: #333639;
    
    --link-color: #34D399;
    --link-hover: #6EE7B7;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.5;
    transition: background-color 0.2s, color 0.2s;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--link-color);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* Navbar */
.navbar {
    background-color: var(--bg-nav);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
    height: 60px;
    display: flex;
    align-items: center;
}

.nav-content {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
    color: var(--brand-primary);
}

.nav-items {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    font-weight: 600;
    color: var(--text-main);
    font-size: 15px;
}
.nav-link:hover {
    color: var(--brand-primary);
    text-decoration: none;
}

.theme-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 18px;
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.theme-btn:hover {
    background-color: var(--border-color);
    opacity: 0.8;
}

#sun-icon { display: none; }
#moon-icon { display: block; }
[data-theme="dark"] #sun-icon { display: block; }
[data-theme="dark"] #moon-icon { display: none; }

/* Layout Structure */
.contact-layout {
    flex: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 20px;
    width: 100%;
}

.page-header {
    text-align: center;
    margin-bottom: 40px;
}

.page-header h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

.page-header p {
    color: var(--text-muted);
    font-size: 18px;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

/* Cards */
.form-card, .sidebar-card {
    background-color: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.form-card {
    padding: 32px;
}

.form-card h2 {
    font-size: 24px;
    margin-bottom: 24px;
    font-weight: 700;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
}

/* Form Styles */
.corporate-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.input-col {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group input, 
.form-group select, 
.form-group textarea {
    width: 100%;
    padding: 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 15px;
    color: var(--text-main);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%2365676B%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat;
    background-position: right 12px top 50%;
    background-size: 12px auto;
}

[data-theme="dark"] .form-group select {
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%2394A3B8%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.form-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 10px 0;
}

/* Button */
.submit-btn {
    background-color: var(--brand-primary);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 160px;
    position: relative;
}

.submit-btn:hover {
    background-color: var(--brand-hover);
}

.submit-btn:active {
    background-color: var(--brand-active);
}

.submit-btn .loader {
    display: none;
    width: 18px;
    height: 18px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.submit-btn.loading .btn-text {
    display: none;
}
.submit-btn.loading .loader {
    display: block;
}
.submit-btn.success {
    background-color: #059669;
}

/* Sidebar */
.sidebar-card {
    padding: 24px;
}

.sidebar-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
}

.help-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.help-links a {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    color: var(--text-main);
}
.help-links a:hover {
    text-decoration: none;
}

.help-links a:hover strong {
    color: var(--brand-primary);
    text-decoration: underline;
}

.link-icon {
    background-color: var(--brand-light);
    color: var(--brand-active);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

[data-theme="dark"] .link-icon {
    background-color: rgba(16, 185, 129, 0.2);
    color: var(--brand-primary);
}

.help-links strong {
    display: block;
    font-size: 15px;
    margin-bottom: 2px;
}

.help-links span {
    font-size: 13px;
    color: var(--text-muted);
}

/* Footer */
.corporate-footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 24px 0;
    margin-top: auto;
}

.footer-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 13px;
}
.footer-links a:hover {
    color: var(--brand-primary);
}

.footer-content p {
    color: var(--text-muted);
    font-size: 13px;
}

/* Responsive */
@media (max-width: 850px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .form-group.row {
        grid-template-columns: 1fr;
    }
    
    .form-card {
        padding: 24px 16px;
    }
}