/* ================================================================
   Veritas Engineering - Careers Application
   Professional Grey & Blue Theme
   ================================================================ */

/* ----------------------------------------------------------------
   CSS Variables (Color Palette)
   ---------------------------------------------------------------- */
:root {
    /* Primary Blues */
    --primary-color: #1a5f9e;
    --primary-dark: #0d4a7c;
    --primary-light: #2d7bc4;
    --primary-subtle: #e8f1f8;

    /* Professional Greys */
    --grey-900: #1a1d21;
    --grey-800: #2d3339;
    --grey-700: #424a52;
    --grey-600: #5a6370;
    --grey-500: #737d8c;
    --grey-400: #9ba4b0;
    --grey-300: #c4c9d1;
    --grey-200: #e2e5e9;
    --grey-100: #f4f5f7;
    --grey-50: #f9fafb;

    /* Accent Colors */
    --success-color: #1d8348;
    --error-color: #c0392b;
    --warning-color: #d4a017;

    /* Semantic Colors */
    --text-primary: var(--grey-900);
    --text-secondary: var(--grey-600);
    --text-muted: var(--grey-500);
    --border-color: var(--grey-300);
    --border-light: var(--grey-200);
    --bg-page: var(--grey-100);
    --bg-card: #ffffff;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(26, 29, 33, 0.08);
    --shadow-md: 0 4px 12px rgba(26, 29, 33, 0.1);
    --shadow-lg: 0 8px 24px rgba(26, 29, 33, 0.12);
    --shadow-xl: 0 12px 40px rgba(26, 29, 33, 0.15);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto',
        'Oxygen', 'Ubuntu', 'Cantarell', 'Helvetica Neue', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: linear-gradient(180deg, var(--grey-200) 0%, var(--grey-100) 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    padding: 40px 20px;
}

/* ----------------------------------------------------------------
   Container
   ---------------------------------------------------------------- */
.container {
    max-width: 720px;
    margin: 0 auto;
    background-color: var(--bg-card);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border-light);
}

/* ----------------------------------------------------------------
   Header
   ---------------------------------------------------------------- */
.header {
    background: linear-gradient(135deg, var(--grey-800) 0%, var(--grey-900) 50%, var(--primary-dark) 100%);
    color: #ffffff;
    padding: 50px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: inset 0 -4px 12px rgba(0, 0, 0, 0.15);
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 1;
}

.header h1 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
    position: relative;
    z-index: 1;
}

.header .company-name {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--primary-light);
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.header p {
    font-size: 1.05rem;
    opacity: 0.85;
    font-weight: 400;
    position: relative;
    z-index: 1;
}

/* ----------------------------------------------------------------
   Form Sections
   ---------------------------------------------------------------- */
form {
    padding: 40px;
}

.form-section {
    margin-bottom: 36px;
    padding: 28px;
    background-color: var(--grey-50);
    border-radius: 10px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.04);
}

.form-section h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--grey-800);
    display: flex;
    align-items: center;
    gap: 12px;
}

.form-section h2::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 24px;
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 2px;
}

/* ----------------------------------------------------------------
   Form Groups
   ---------------------------------------------------------------- */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-group label .required {
    color: var(--primary-color);
    font-weight: 600;
    margin-left: 2px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1.5px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    background-color: var(--bg-card);
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--grey-400);
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: var(--grey-400);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(26, 95, 158, 0.12), var(--shadow-md);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

.form-group select {
    background-color: var(--bg-card);
    cursor: pointer;
    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='%235a6370' 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 12px center;
    background-size: 18px;
    appearance: none;
    padding-right: 44px;
}

/* ----------------------------------------------------------------
   File Upload
   ---------------------------------------------------------------- */
.file-upload-wrapper {
    position: relative;
}

.file-upload-wrapper input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.file-upload-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    background-color: var(--grey-50);
    box-shadow: var(--shadow-sm);
}

.file-upload-label:hover {
    border-color: var(--primary-color);
    background-color: var(--primary-subtle);
    box-shadow: var(--shadow-md);
}

.file-upload-text {
    color: var(--text-secondary);
    flex: 1;
    font-size: 0.95rem;
}

.file-upload-button {
    padding: 10px 24px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: #ffffff;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.file-upload-label:hover .file-upload-button {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    box-shadow: var(--shadow-md);
}

.file-info {
    margin-top: 10px;
}

.file-info small {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ----------------------------------------------------------------
   Error Messages
   ---------------------------------------------------------------- */
span.error-message {
    display: block;
    color: var(--error-color);
    font-size: 0.85rem;
    margin-top: 6px;
    min-height: 20px;
    font-weight: 500;
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
    border-color: var(--error-color);
    background-color: #fdf5f4;
}

.form-group input.error:focus,
.form-group select.error:focus,
.form-group textarea.error:focus {
    box-shadow: 0 0 0 4px rgba(192, 57, 43, 0.1);
}

/* ----------------------------------------------------------------
   Form Actions
   ---------------------------------------------------------------- */
.form-actions {
    margin-top: 40px;
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-light);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: #ffffff;
    padding: 16px 48px;
    font-size: 1.05rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: var(--shadow-md);
    letter-spacing: 0.3px;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn-primary:disabled {
    background: var(--grey-300);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ----------------------------------------------------------------
   Loading Overlay
   ---------------------------------------------------------------- */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(26, 29, 33, 0.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
}

.loading-overlay p {
    color: #ffffff;
    font-size: 1.1rem;
    margin-top: 24px;
    font-weight: 500;
}

.spinner {
    border: 3px solid rgba(255, 255, 255, 0.2);
    border-top: 3px solid var(--primary-light);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    animation: spin 0.9s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ----------------------------------------------------------------
   Messages
   ---------------------------------------------------------------- */
.message {
    padding: 36px;
    margin: 36px;
    border-radius: 10px;
    text-align: center;
}

.message h3 {
    font-size: 1.4rem;
    margin-bottom: 16px;
    font-weight: 600;
}

.message p {
    font-size: 1rem;
    margin-bottom: 10px;
    line-height: 1.7;
}

.success-message {
    background: linear-gradient(135deg, #e8f5ed 0%, #d4edda 100%);
    border: 1px solid #b8dcc4;
    color: #1d5c38;
    box-shadow: var(--shadow-md);
}

.success-message h3 {
    color: #1d5c38;
}

div.error-message {
    background: linear-gradient(135deg, #fbeae9 0%, #f8d7da 100%);
    border: 1px solid #f0b8bc;
    color: #8c2e25;
    padding: 36px;
    margin: 36px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow-md);
}

div.error-message h3 {
    color: #8c2e25;
    font-size: 1.4rem;
    margin-bottom: 16px;
    font-weight: 600;
}

div.error-message p {
    font-size: 1rem;
    margin-bottom: 10px;
    line-height: 1.7;
}

/* ----------------------------------------------------------------
   Footer Note
   ---------------------------------------------------------------- */
.footer-note {
    text-align: center;
    padding: 20px 40px 30px;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-light);
}

/* ----------------------------------------------------------------
   Responsive Design
   ---------------------------------------------------------------- */
@media (max-width: 768px) {
    body {
        padding: 16px;
    }

    .container {
        border-radius: 10px;
    }

    .header {
        padding: 36px 24px;
    }

    .header h1 {
        font-size: 1.75rem;
    }

    .header .company-name {
        font-size: 0.8rem;
        letter-spacing: 2px;
    }

    form {
        padding: 28px 24px;
    }

    .form-section h2 {
        font-size: 1.15rem;
    }

    .btn-primary {
        width: 100%;
        padding: 16px;
    }

    .message {
        margin: 24px;
        padding: 28px;
    }

    div.error-message {
        margin: 24px;
        padding: 28px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 12px;
    }

    .header {
        padding: 32px 20px;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .header p {
        font-size: 0.95rem;
    }

    form {
        padding: 24px 20px;
    }

    .form-section h2 {
        font-size: 1.1rem;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px; /* Prevents zoom on iOS */
        padding: 12px 14px;
    }

    .file-upload-label {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .file-upload-button {
        width: 100%;
    }

    .message {
        margin: 16px;
        padding: 24px;
    }

    div.error-message {
        margin: 16px;
        padding: 24px;
    }
}