/* Ultra Premium Login Design - Fully Responsive */

/* Variables for consistent theming */
:root {
    --primary-dark: #0d1b2a;
    --primary-mid: #1b263b;
    --primary-light: #415a77;
    --accent: #778da9;
    --accent-light: #8a9fb5;
    --glass-bg: rgba(13, 27, 42, 0.85);
    --glass-border: rgba(119, 141, 169, 0.2);
}

/* Base Styles */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
}

/* Logo Styling */
#login_logo { 
    height: 90px; 
    max-width: 90%;
    object-fit: contain;
    filter: drop-shadow(0 8px 24px rgba(0,0,0,0.4));
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

#login_logo:hover {
    transform: scale(1.08) translateY(-5px);
    filter: drop-shadow(0 12px 32px rgba(119,141,169,0.5));
}

/* Main Background Container */
#intro_top { 
    width: 100%; 
    min-height: 100vh;
    z-index: 1; 
    position: relative; 
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, #0d1b2a 0%, #1b263b 40%, #415a77 100%);
    background-size: 400% 400%;
    animation: gradientFlow 20s ease infinite;
    overflow: hidden;
}

/* Background Image Layer */
#intro_top::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('images/background.jpg') center center no-repeat;
    background-size: cover;
    background-attachment: fixed;
    opacity: 0.12;
    z-index: 0;
}

/* Animated Background Pattern */
#intro_top::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(119,141,169,0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(65,90,119,0.15) 0%, transparent 50%);
    animation: rotatePattern 40s linear infinite;
    z-index: 0;
}

@keyframes gradientFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

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

/* Main Wrapper */
#login_wrap { 
    width: 100%; 
    min-height: 100vh;
    position: relative;
}

/* Login Container */
#login_all { 
    width: 100%;
    max-width: 520px;
    border-radius: 32px; 
    display: block; 
    margin: 0 auto; 
    color: #fff; 
    background: var(--glass-bg);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    border: 1px solid var(--glass-border);
    box-shadow: 
        0 30px 90px rgba(0,0,0,0.5),
        0 0 120px rgba(119,141,169,0.2),
        inset 0 2px 2px rgba(255,255,255,0.1),
        inset 0 -2px 2px rgba(0,0,0,0.1);
    position: relative;
    z-index: 10;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    animation: slideInUp 0.8s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#login_all:hover {
    box-shadow: 
        0 40px 110px rgba(0,0,0,0.6),
        0 0 150px rgba(119,141,169,0.3),
        inset 0 2px 3px rgba(255,255,255,0.15),
        inset 0 -2px 3px rgba(0,0,0,0.1);
    transform: translateY(-8px);
    border-color: rgba(119,141,169,0.35);
}

/* Glass Shine Effect */
#login_all::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(180deg, rgba(255,255,255,0.08) 0%, transparent 100%);
    border-radius: 32px 32px 0 0;
    pointer-events: none;
}

/* Padding Utility */
.pad30 {
    padding: 45px 40px;
}

/* Language Selector */
#intro_lang { 
    position: absolute; 
    top: 20px; 
    right: 25px; 
    width: 56px; 
    height: 56px; 
    background: rgba(119,141,169,0.15);
    border-radius: 50%;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(119,141,169,0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

#intro_lang:hover {
    background: rgba(119,141,169,0.3);
    transform: scale(1.15) rotate(10deg);
    box-shadow: 0 8px 28px rgba(119,141,169,0.4);
    border-color: rgba(119,141,169,0.5);
}

#intro_lang:active {
    transform: scale(1.05) rotate(5deg);
}

.intro_lang {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

/* Login Text Styling */
.login_text {
    text-shadow: 0 4px 16px rgba(0,0,0,0.4);
    animation: fadeIn 1s ease-out 0.3s both;
}

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

.login_text .bold {
    font-weight: 700;
    background: linear-gradient(135deg, #ffffff 0%, #778da9 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.5px;
}

.login_text .text_xlarge {
    font-size: 2em;
    margin-bottom: 8px;
}

.login_text .text_med {
    font-size: 1.05em;
    color: rgba(255,255,255,0.85);
    line-height: 1.6;
}

/* Centered Elements */
.centered_element {
    text-align: center;
}

/* Vertical Padding */
.vpad20 {
    padding: 25px 0;
}

.vpad15 {
    padding: 20px 0;
}

.tpad20 {
    padding-top: 25px;
}

.bpad10 {
    padding-bottom: 12px;
}

.tpad5 {
    padding-top: 8px;
}

/* Button Base Styling */
.large_button_rounded {
    width: 100%;
    padding: 18px 32px;
    font-size: 1.1em;
    font-weight: 600;
    letter-spacing: 0.8px;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    border: none;
    margin-bottom: 15px;
    text-transform: uppercase;
    font-family: inherit;
}

/* Login Button */
.intro_login_btn {
    background: linear-gradient(135deg, #778da9 0%, #415a77 100%);
    color: #ffffff;
    box-shadow: 
        0 12px 35px rgba(119,141,169,0.45),
        inset 0 2px 2px rgba(255,255,255,0.25),
        inset 0 -2px 2px rgba(0,0,0,0.1);
    animation: fadeIn 1s ease-out 0.5s both;
}

.intro_login_btn:hover {
    background: linear-gradient(135deg, #8a9fb5 0%, #4d6685 100%);
    box-shadow: 
        0 18px 50px rgba(119,141,169,0.6),
        inset 0 2px 3px rgba(255,255,255,0.3),
        inset 0 -2px 3px rgba(0,0,0,0.1);
    transform: translateY(-4px);
}

.intro_login_btn:active {
    transform: translateY(-2px);
    box-shadow: 
        0 10px 30px rgba(119,141,169,0.5),
        inset 0 2px 2px rgba(255,255,255,0.2);
}

/* Guest Button */
.intro_guest_btn {
    background: rgba(119,141,169,0.15);
    color: #ffffff;
    border: 2px solid rgba(119,141,169,0.4);
    box-shadow: 0 8px 28px rgba(0,0,0,0.25);
    animation: fadeIn 1s ease-out 0.6s both;
}

.intro_guest_btn:hover {
    background: rgba(119,141,169,0.3);
    border-color: rgba(119,141,169,0.6);
    box-shadow: 0 12px 35px rgba(119,141,169,0.35);
    transform: translateY(-4px);
}

.intro_guest_btn:active {
    transform: translateY(-2px);
}

/* Button Ripple Effect */
.intro_login_btn::before, 
.intro_guest_btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.intro_login_btn:hover::before, 
.intro_guest_btn:hover::before {
    width: 400px;
    height: 400px;
}

/* Button Icons */
.intro_login_btn i,
.intro_guest_btn i {
    margin-right: 10px;
    font-size: 1.1em;
}

/* Registration Section */
.login_not_member { 
    text-align: center; 
    padding-top: 8px; 
}

.text_xsmall {
    color: rgba(255,255,255,0.7);
    font-size: 0.95em;
    margin-bottom: 8px;
}

.tpad20 .bclick {
    color: var(--accent);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
    position: relative;
    cursor: pointer;
    font-size: 1.05em;
}

.tpad20 .bclick::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-light);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.tpad20 .bclick:hover {
    color: var(--accent-light);
    text-shadow: 0 0 15px rgba(119,141,169,0.6);
    transform: translateY(-2px);
}

.tpad20 .bclick:hover::after {
    width: 100%;
}

/* Section CSS */
.section { 
    width: 100%; 
    min-height: 200px;
    margin: 0 auto; 
    background: linear-gradient(to bottom, var(--primary-dark), var(--primary-mid));
    padding: 80px 20px;
}

.section_content { 
    width: 100%; 
    max-width: 1100px; 
    margin: 0 auto; 
}

.section_inside { 
    margin: 0 auto; 
}

/* Utility Classes */
.bclick {
    cursor: pointer;
    user-select: none;
}

.btable {
    display: table;
    width: 100%;
    height: 100%;
}

.bcell_mid {
    display: table-cell;
    vertical-align: middle;
}

.clear {
    clear: both;
}

.bold {
    font-weight: 700;
}

/* Responsive Design - Tablet */
@media screen and (max-width: 768px) {
    #login_logo {
        height: 70px;
    }
    
    #login_all {
        max-width: 90%;
        border-radius: 24px;
    }
    
    .pad30 {
        padding: 35px 30px;
    }
    
    .login_text .text_xlarge {
        font-size: 1.7em;
    }
    
    .login_text .text_med {
        font-size: 1em;
    }
    
    .large_button_rounded {
        padding: 16px 28px;
        font-size: 1.05em;
    }
    
    #intro_lang {
        width: 50px;
        height: 50px;
        top: 15px;
        right: 20px;
    }
    
    .intro_lang {
        width: 28px;
        height: 28px;
    }
}

/* Responsive Design - Mobile */
@media screen and (max-width: 480px) {
    #intro_top {
        padding: 30px 15px;
    }
    
    #login_logo {
        height: 60px;
    }
    
    #login_all {
        max-width: 95%;
        border-radius: 20px;
    }
    
    .pad30 {
        padding: 30px 25px;
    }
    
    .login_text .text_xlarge {
        font-size: 1.5em;
    }
    
    .login_text .text_med {
        font-size: 0.95em;
    }
    
    .vpad20 {
        padding: 20px 0;
    }
    
    .vpad15 {
        padding: 15px 0;
    }
    
    .large_button_rounded {
        padding: 15px 24px;
        font-size: 1em;
        letter-spacing: 0.5px;
        margin-bottom: 12px;
    }
    
    #intro_lang {
        width: 46px;
        height: 46px;
        top: 12px;
        right: 15px;
    }
    
    .intro_lang {
        width: 26px;
        height: 26px;
    }
    
    .tpad20 {
        padding-top: 20px;
    }
    
    .section {
        padding: 60px 15px;
    }
}

/* Extra Small Devices */
@media screen and (max-width: 360px) {
    #login_logo {
        height: 50px;
    }
    
    .pad30 {
        padding: 25px 20px;
    }
    
    .login_text .text_xlarge {
        font-size: 1.3em;
    }
    
    .login_text .text_med {
        font-size: 0.9em;
    }
    
    .large_button_rounded {
        padding: 14px 20px;
        font-size: 0.95em;
    }
}

/* Landscape Mode for Mobile */
@media screen and (max-height: 600px) and (orientation: landscape) {
    #intro_top {
        padding: 20px 15px;
        min-height: auto;
    }
    
    #login_logo {
        height: 50px;
    }
    
    .pad30 {
        padding: 25px 30px;
    }
    
    .vpad20, .vpad15 {
        padding: 10px 0;
    }
    
    .login_text .text_xlarge {
        font-size: 1.4em;
    }
    
    .tpad20 {
        padding-top: 15px;
    }
}

/* High DPI Screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    #login_logo {
        image-rendering: -webkit-optimize-contrast;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    #login_all {
        background: rgba(13, 27, 42, 0.9);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Styles */
@media print {
    #intro_top::before,
    #intro_top::after {
        display: none;
    }
    
    #login_all {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .large_button_rounded {
        min-height: 50px;
    }
    
    #intro_lang {
        min-width: 50px;
        min-height: 50px;
    }
    
    .bclick {
        padding: 10px;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--primary-dark);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(to bottom, var(--accent), var(--primary-light));
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(to bottom, var(--accent-light), #4d6685);
}

/* Firefox Scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--accent) var(--primary-dark);
}