/* ========================================
   CSS Variables & Base Styles
   ======================================== */
:root {
    --primary-color: #000000;
    --primary-hover: #333333;
    --background: #ffffff;
    --surface: #f8f8f8;
    --surface-hover: #f0f0f0;
    --border: #e5e5e5;
    --border-focus: #000000;
    --text-primary: #000000;
    --text-secondary: #666666;
    --text-muted: #999999;
    --text-placeholder: #aaaaaa;
    --error: #e53e3e;
    --error-bg: #fff5f5;
    --error-border: #fed7d7;
    --success: #38a169;
    --success-bg: #f0fff4;
    --verified: #00c853;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ========================================
   Layout
   ======================================== */
.app-container {
    min-height: 100vh;
    padding: 40px 20px;
}

.main-content {
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Header
   ======================================== */
.header {
    max-width: 600px;
    margin: 0 auto 60px;
    text-align: center;
}

.logo-container {
    margin-bottom: 24px;
}

.logo-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #000000 0%, #333333 100%);
    border-radius: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-md);
}

.header-title {
    font-size: clamp(32px, 8vw, 48px);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    margin-bottom: 8px;
}

.header-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: -0.01em;
}

/* ========================================
   Form Sections
   ======================================== */
.form-section {
    margin-bottom: 48px;
}

.section-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--surface);
    border-radius: 8px;
    color: var(--text-secondary);
}

.form-fields {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* ========================================
   Input Groups (Floating Labels)
   ======================================== */
.input-group {
    position: relative;
}

.input-group input,
.input-group textarea {
    width: 100%;
    padding: 18px 20px;
    font-size: 16px;
    font-family: var(--font-family);
    border: 1.5px solid var(--border);
    border-radius: var(--border-radius);
    background: var(--background);
    color: var(--text-primary);
    outline: none;
    transition: var(--transition);
}

.input-group textarea {
    resize: vertical;
    min-height: 80px;
}

.input-group label {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 16px;
    color: var(--text-placeholder);
    pointer-events: none;
    transition: var(--transition);
    background: var(--background);
    padding: 0 4px;
}

.input-group textarea + label {
    top: 24px;
}

/* Focus & Filled States */
.input-group input:focus,
.input-group textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

.input-group input:focus + label,
.input-group input:not(:placeholder-shown) + label,
.input-group textarea:focus + label,
.input-group textarea:not(:placeholder-shown) + label {
    top: 0;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Readonly State */
.input-group.readonly input,
.input-group.readonly textarea {
    background: var(--surface);
    color: var(--text-primary);
    cursor: default;
}

.input-group.readonly label {
    background: linear-gradient(var(--background) 50%, var(--surface) 50%);
}

.input-group.readonly input:focus + label,
.input-group.readonly textarea:focus + label {
    top: 0;
    font-size: 12px;
}

/* Verified Badge */
.verified-badge {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    background: var(--verified);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    animation: scaleIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Loader in Input */
.input-group.has-loader .loader {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    display: none;
}

.input-group.has-loader .loader.active {
    display: block;
}

/* Company Info Animation */
.company-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
    animation: slideDown 0.4s ease-out;
}

.company-info.hidden {
    display: none;
}

/* ========================================
   Upload Area
   ======================================== */
.upload-area {
    animation: fadeIn 0.3s ease-out;
}

.upload-buttons {
    display: flex;
    gap: 12px;
}

.upload-btn {
    flex: 1;
    padding: 28px 20px;
    background: var(--surface);
    border: 2px dashed var(--border);
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-family);
    color: var(--text-primary);
}

.upload-btn:hover {
    border-color: var(--border-focus);
    background: var(--background);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.upload-btn span {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.upload-btn svg {
    color: var(--text-primary);
    transition: var(--transition);
}

.upload-btn:hover svg {
    transform: scale(1.1);
}

/* Preview Area */
.preview-area {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1.5px solid var(--border);
    animation: fadeIn 0.3s ease-out;
}

.preview-area.hidden {
    display: none;
}

.preview-area img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 400px;
    object-fit: contain;
    background: var(--surface);
}

.change-image-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 10px 16px;
    background: rgba(0, 0, 0, 0.85);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-family);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    backdrop-filter: blur(10px);
}

.change-image-btn:hover {
    background: rgba(0, 0, 0, 0.95);
    transform: scale(1.02);
}

/* ========================================
   Error Message
   ======================================== */
.error-message {
    padding: 16px 20px;
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    animation: shake 0.4s ease-out;
}

.error-message.hidden {
    display: none;
}

.error-message svg {
    color: var(--error);
    flex-shrink: 0;
}

.error-message span {
    font-size: 14px;
    color: #c53030;
    line-height: 1.5;
}

/* ========================================
   Submit Button
   ======================================== */
.submit-btn {
    width: 100%;
    padding: 18px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
}

.submit-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: 0.5s;
}

.submit-btn:hover::before {
    left: 100%;
}

.submit-btn:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.submit-btn:active:not(:disabled) {
    transform: translateY(0);
}

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

.submit-btn .btn-loader {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
}

.submit-btn .btn-loader.hidden {
    display: none;
}

.submit-btn.loading svg:first-child,
.submit-btn.loading span {
    opacity: 0;
}

.submit-btn.loading .btn-loader {
    display: flex;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    margin-top: 60px;
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

.footer-text {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.footer-copyright {
    font-size: 13px;
    color: #cccccc;
}

/* ========================================
   Success View
   ======================================== */
.success-view {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.success-view.hidden {
    display: none;
}

.success-content {
    max-width: 480px;
    width: 100%;
    text-align: center;
    animation: fadeIn 0.6s ease-out;
}

.success-icon {
    width: 88px;
    height: 88px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 32px;
    color: white;
    animation: scaleIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.success-title {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.success-description {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 40px;
}

.reset-btn {
    width: 100%;
    padding: 18px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    transition: var(--transition);
}

.reset-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* ========================================
   Toast Notification
   ======================================== */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 14px 24px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
}

.toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.hidden {
    display: block;
}

/* ========================================
   Spinner
   ======================================== */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner.white {
    border-color: rgba(255, 255, 255, 0.3);
    border-top-color: white;
}

/* ========================================
   Utility Classes
   ======================================== */
.hidden {
    display: none !important;
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        transform: scale(0);
    }
    to {
        transform: scale(1);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% { transform: translateX(5px); }
}

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

/* ========================================
   Responsive Styles
   ======================================== */
@media (max-width: 640px) {
    .app-container {
        padding: 24px 16px;
    }
    
    .header {
        margin-bottom: 40px;
    }
    
    .logo-icon {
        width: 56px;
        height: 56px;
        border-radius: 14px;
    }
    
    .logo-icon svg {
        width: 28px;
        height: 28px;
    }
    
    .form-section {
        margin-bottom: 36px;
    }
    
    .section-title {
        font-size: 12px;
        margin-bottom: 18px;
    }
    
    .input-group input,
    .input-group textarea {
        padding: 16px 18px;
        font-size: 16px; /* Prevent zoom on iOS */
    }
    
    .upload-btn {
        padding: 24px 16px;
    }
    
    .upload-btn svg {
        width: 28px;
        height: 28px;
    }
    
    .submit-btn {
        padding: 16px 20px;
    }
    
    .footer {
        margin-top: 40px;
        padding-top: 32px;
    }
    
    .success-icon {
        width: 72px;
        height: 72px;
    }
    
    .success-icon svg {
        width: 40px;
        height: 40px;
    }
    
    .success-title {
        font-size: 24px;
    }
    
    .success-description {
        font-size: 15px;
    }
}

@media (max-width: 380px) {
    .upload-buttons {
        flex-direction: column;
    }
    
    .upload-btn {
        flex-direction: row;
        padding: 16px 20px;
        gap: 16px;
    }
    
    .upload-btn svg {
        width: 24px;
        height: 24px;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --background: #000000;
        --surface: #1c1c1e;
        --surface-hover: #2c2c2e;
        --border: #38383a;
        --border-focus: #ffffff;
        --text-primary: #ffffff;
        --text-secondary: #a1a1a6;
        --text-muted: #6e6e73;
        --text-placeholder: #6e6e73;
    }
    
    .logo-icon {
        background: linear-gradient(135deg, #ffffff 0%, #d1d1d6 100%);
        color: #000000;
    }
    
    .submit-btn,
    .reset-btn {
        background: #ffffff;
        color: #000000;
    }
    
    .submit-btn:hover:not(:disabled),
    .reset-btn:hover {
        background: #d1d1d6;
    }
    
    .success-icon {
        background: #ffffff;
        color: #000000;
    }
    
    .verified-badge {
        background: var(--verified);
    }
    
    .spinner {
        border-color: var(--border);
        border-top-color: #ffffff;
    }
    
    .spinner.white {
        border-color: rgba(0, 0, 0, 0.3);
        border-top-color: #000000;
    }
    
    .input-group.readonly label {
        background: linear-gradient(var(--background) 50%, var(--surface) 50%);
    }
}

/* Success Contact Btn */
.success-contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #0068FF;
    color: white;
    padding: 12px 24px;
    border-radius: 99px;
    text-decoration: none;
    font-weight: 600;
    margin: 16px 0 24px;
    transition: opacity 0.2s;
}
.success-contact-btn:hover { opacity: 0.9; }