/* Base styles - applying variables */
:root {
    --color-bg-primary: #f8f9fa;      /* Very light gray */
    --color-bg-secondary: #ffffff;    /* White */
    --color-text-primary: #212529;    /* Dark charcoal */
    --color-text-secondary: #6c757d;  /* Lighter gray */
    --color-accent: #20c997;          /* Vibrant teal */
    --color-link-hover: #17a278;      /* Darker teal for hover */
    --color-border: #dee2e6;          /* Light gray border */
    --color-shadow: rgba(32, 201, 151, 0.1); /* Teal-tinted shadow */

    --border-radius: 12px;
    --padding-base: 24px;

    color-scheme: light;
}

/* Dark theme variables */
body[data-theme="dark"] {
    --color-bg-primary: #121212;      /* Very dark gray, almost black */
    --color-bg-secondary: #1e1e1e;    /* Dark gray for cards */
    --color-text-primary: #e9ecef;    /* Light gray/off-white */
    --color-text-secondary: #adb5bd;  /* Medium gray */
    --color-accent: #66d9b3;          /* Bright teal */
    --color-link-hover: #90e4c8;      /* Even brighter teal for hover */
    --color-border: #343a40;          /* Darker gray border */
    --color-shadow: rgba(0, 0, 0, 0.4); /* Stronger shadow in dark mode */

    color-scheme: dark;
}

body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease; /* Smooth transition */
}

.header {
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    padding: var(--padding-base) 0;
    text-align: center;
    box-shadow: 0 4px 12px var(--color-shadow);
    position: relative;
    border-bottom: 1px solid var(--color-border);
}

.site-title {
    margin: 0;
    font-size: 2.5em;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--color-accent);
    text-shadow: none;
}

.main-content {
    flex: 1;
    max-width: 900px;
    margin: var(--padding-base) auto;
    padding: 0 var(--padding-base);
    display: flex;
    flex-direction: column;
    gap: var(--padding-base);
}

section {
    background-color: var(--color-bg-secondary);
    padding: var(--padding-base);
    border-radius: var(--border-radius);
    box-shadow: 0 6px 20px var(--color-shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--color-border);
}

section:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px var(--color-shadow);
}

h2 {
    color: var(--color-accent);
    text-align: center;
    margin-top: 0;
    margin-bottom: var(--padding-base);
    font-size: 1.8em;
    font-weight: 600;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 1.1em;
    padding: 10px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.contact-item:hover {
    background-color: var(--color-bg-primary);
    transform: translateX(5px);
}

.contact-item:last-child {
    margin-bottom: 0;
}

.contact-item .icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    transition: filter 0.3s ease;
}

body[data-theme="dark"] .icon-phone {
    filter: brightness(0) invert(1);
}

.contact-item a {
    color: var(--color-text-secondary); /* Text color for contact info */
    text-decoration: none;
    transition: all 0.3s ease;
    word-break: break-word;
    font-weight: 400;
}

.contact-item a:hover {
    color: var(--color-accent); /* Hover uses accent color */
    text-decoration: underline;
}

.social-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    padding: 10px 0;
}

.social-links a {
    display: block;
    width: 50px;
    height: 50px;
    transition: all 0.2s ease;
    border-radius: 12px;
    padding: 8px;
    background-color: var(--color-bg-primary);
}

.social-links a:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 8px 20px var(--color-shadow);
    background-color: var(--color-accent);
}

.social-links a:hover img {
    filter: none;
}

.social-links img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: filter 0.3s ease;
    filter: none;
}

.footer {
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    text-align: center;
    padding: 24px 0;
    margin-top: var(--padding-base);
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -4px 12px var(--color-shadow);
}

.theme-toggle {
    position: absolute;
    top: 50%;
    right: var(--padding-base);
    transform: translateY(-50%);
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    cursor: pointer;
    font-size: 1.5em;
    color: var(--color-text-primary);
    transition: all 0.3s ease;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    box-sizing: border-box;
}

.theme-toggle:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-50%) scale(1.1);
}

.save-contact-btn {
    width: 100%;
    background: var(--color-accent);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    margin-top: 16px;
    transition: all 0.3s ease;
    font-family: 'Poppins', sans-serif;
}

.save-contact-btn:hover {
    background: var(--color-link-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.save-contact-btn:active {
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --padding-base: 20px;
    }

    .site-title {
        font-size: 2.2em;
        margin: 0 60px 0 20px;
        text-align: left;
    }

    .main-content {
        padding: 0 20px;
        margin: 20px auto;
        gap: 20px;
    }

    section {
        padding: 20px;
        border-radius: 10px;
    }

    h2 {
        font-size: 1.6em;
        margin-bottom: 20px;
    }

    .contact-item {
        font-size: 1em;
        gap: 16px;
        padding: 12px;
        margin-bottom: 12px;
    }

    .contact-item .icon {
        width: 28px;
        height: 28px;
    }

    .social-links {
        gap: 16px;
    }

    .social-links a {
        width: 48px;
        height: 48px;
        border-radius: 10px;
        padding: 6px;
    }

    .theme-toggle {
        font-size: 1.4em;
        right: 20px;
        padding: 0;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 15px;
    }
    
    .site-title {
        font-size: 1.8em;
        margin: 0 60px 0 15px;
    }

    .main-content {
        padding: 0 15px;
        margin: 15px auto;
    }

    section {
        padding: 16px;
    }

    .contact-item {
        font-size: 1em;
        gap: 12px;
        padding: 10px;
    }

    .contact-item .icon {
        width: 24px;
        height: 24px;
    }

    .social-links {
        gap: 12px;
    }

    .social-links a {
        width: 44px;
        height: 44px;
        border-radius: 8px;
    }

    .theme-toggle {
        font-size: 1.2em;
        right: 15px;
        width: 40px;
        height: 40px;
    }

    .footer {
        padding: 16px 15px;
    }
}

/* Enhanced touch targets for mobile */
@media (max-width: 768px) {
    .contact-item,
    .social-links a,
    .theme-toggle {
        min-height: 44px; /* iOS recommended touch target size */
    }

    .contact-item {
        display: flex;
        align-items: center;
        padding-top: 8px;
        padding-bottom: 8px;
    }

    .contact-item a {
       flex-grow: 1;
       padding: 8px 0;
       display: inline-block;
    }

    .social-links a,
    .theme-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}